diff --git a/projects/packages/premium-analytics/changelog/add-react-query-devtools-widget b/projects/packages/premium-analytics/changelog/add-react-query-devtools-widget
new file mode 100644
index 000000000000..78f1b1ac4484
--- /dev/null
+++ b/projects/packages/premium-analytics/changelog/add-react-query-devtools-widget
@@ -0,0 +1,4 @@
+Significance: minor
+Type: added
+
+Dashboard: add a React Query Devtools widget, gated to non-production environments through a new `jetpack_premium_analytics_widget_types` filter for scoping widget types server-side.
diff --git a/projects/packages/premium-analytics/packages/data/package.json b/projects/packages/premium-analytics/packages/data/package.json
index 46765a1e3e32..79b6e32b2af5 100644
--- a/projects/packages/premium-analytics/packages/data/package.json
+++ b/projects/packages/premium-analytics/packages/data/package.json
@@ -18,8 +18,5 @@
 		"@wordpress/i18n": "^6.9.0",
 		"@wordpress/url": "4.48.1",
 		"date-fns": "4.1.0"
-	},
-	"devDependencies": {
-		"@tanstack/react-query-devtools": "5.90.2"
 	}
 }
diff --git a/projects/packages/premium-analytics/packages/data/src/providers/query-client-provider.tsx b/projects/packages/premium-analytics/packages/data/src/providers/query-client-provider.tsx
index dfb504ca2e26..4121d4466454 100644
--- a/projects/packages/premium-analytics/packages/data/src/providers/query-client-provider.tsx
+++ b/projects/packages/premium-analytics/packages/data/src/providers/query-client-provider.tsx
@@ -2,7 +2,7 @@
  * External dependencies
  */
 import { QueryClient, QueryClientProvider, QueryCache } from '@tanstack/react-query';
-import { ReactNode, lazy, Suspense } from 'react';
+import { ReactNode } from 'react';
 /**
  * Internal dependencies
  */
@@ -11,19 +11,6 @@ import { globalErrorManager } from './global-error-manager';
 const DEFAULT_STALE_TIME = 5 * 60 * 1000;
 const DEFAULT_GC_TIME = 10 * 60 * 1000;
 
-// Upstream gates devtools behind an admin-toolkit experiment flag; that system
-// isn't available here, so we show them in dev builds only. Gate the `lazy()`
-// creation on NODE_ENV (not just the render) so the dynamic import sits in a
-// dead branch that production builds tree-shake out — no orphaned chunk.
-const ReactQueryDevtools =
-	process.env.NODE_ENV !== 'production'
-		? lazy( () =>
-				import( '@tanstack/react-query-devtools' ).then( d => ( {
-					default: d.ReactQueryDevtools,
-				} ) )
-		  )
-		: null;
-
 /**
  * Extract HTTP status code from various error formats.
  * WordPress REST API errors may have different shapes.
@@ -133,14 +120,5 @@ export const queryClient = new QueryClient( {
 } );
 
 export const AnalyticsQueryClientProvider = ( { children }: { children: ReactNode } ) => {
-	return (
-		<QueryClientProvider client={ queryClient }>
-			<>{ children }</>
-			{ ReactQueryDevtools && (
-				<Suspense fallback={ null }>
-					<ReactQueryDevtools initialIsOpen={ false } />
-				</Suspense>
-			) }
-		</QueryClientProvider>
-	);
+	return <QueryClientProvider client={ queryClient }>{ children }</QueryClientProvider>;
 };
diff --git a/projects/packages/premium-analytics/src/class-analytics.php b/projects/packages/premium-analytics/src/class-analytics.php
index daccd953800c..c50101ede430 100644
--- a/projects/packages/premium-analytics/src/class-analytics.php
+++ b/projects/packages/premium-analytics/src/class-analytics.php
@@ -70,6 +70,10 @@ public static function init( $options = array() ) {
 		// Hydrate the widget type registry from the build manifest at init.
 		require_once __DIR__ . '/widget-types.php';
 
+		// Layer the availability filter over the registry (environment gating
+		// and any host overrides) before the modules below expose the types.
+		require_once __DIR__ . '/widget-availability.php';
+
 		// Expose dashboard widget modules over REST and wire them into the
 		// page import map for dynamic import() on the client.
 		require_once __DIR__ . '/widget-modules.php';
diff --git a/projects/packages/premium-analytics/src/widget-availability.php b/projects/packages/premium-analytics/src/widget-availability.php
new file mode 100644
index 000000000000..6fc61a4b8a18
--- /dev/null
+++ b/projects/packages/premium-analytics/src/widget-availability.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Widget type availability: a filterable view over the registry.
+ *
+ * The registry (widget-types.php) holds every widget from the build manifest,
+ * unfiltered. This adds the policy layer: the
+ * `jetpack_premium_analytics_widget_types` filter, resolved by
+ * get_available_widget_types(). The REST list and the page import map both read
+ * through it, so dropping a type there hides it from the client entirely.
+ *
+ * Ships one policy: the developer-only React Query Devtools widget is gated to
+ * non-production. Hook the filter to scope types by capability, flag, site, etc.
+ *
+ * @package automattic/jetpack-premium-analytics
+ */
+
+namespace Automattic\Jetpack\PremiumAnalytics;
+
+/**
+ * Filter over the available widget types map (`$name => Widget_Type`).
+ */
+const WIDGET_TYPES_FILTER = 'jetpack_premium_analytics_widget_types';
+
+/**
+ * Returns the widget types available for the current request.
+ *
+ * Every registered widget type, run through WIDGET_TYPES_FILTER. Use this, not
+ * get_registered_widget_types(), anywhere widget types reach the client, so the
+ * same policy covers the REST list and the import map.
+ *
+ * @return Widget_Type[] Map of `$name => Widget_Type`.
+ */
+function get_available_widget_types() {
+	/**
+	 * Filters the widget types available to the dashboard this request.
+	 *
+	 * Removing an entry drops it from the `/jetpack/v4/widget-modules` REST list
+	 * and the page import map, so it cannot be rendered or added.
+	 *
+	 * @param Widget_Type[] $widget_types Map of `$name => Widget_Type`.
+	 */
+	return apply_filters( WIDGET_TYPES_FILTER, get_registered_widget_types() );
+}
+
+/**
+ * Hides developer-only widget types in production.
+ *
+ * Keyed off wp_get_environment_type(), which defaults to `production`: a site
+ * opts in by declaring `WP_ENVIRONMENT_TYPE` as `local`, `development`, or
+ * `staging`.
+ *
+ * @param Widget_Type[] $widget_types Map of `$name => Widget_Type`.
+ * @return Widget_Type[] The map minus developer-only types in production.
+ */
+function filter_widget_types_by_environment( $widget_types ) {
+	if ( 'production' !== wp_get_environment_type() ) {
+		return $widget_types;
+	}
+
+	// Types that must never reach a production dashboard.
+	$non_production_only = array( 'jpa/react-query-dev-tool' );
+
+	foreach ( $non_production_only as $widget_type_name ) {
+		unset( $widget_types[ $widget_type_name ] );
+	}
+
+	return $widget_types;
+}
+
+add_filter( WIDGET_TYPES_FILTER, __NAMESPACE__ . '\\filter_widget_types_by_environment' );
diff --git a/projects/packages/premium-analytics/src/widget-modules.php b/projects/packages/premium-analytics/src/widget-modules.php
index 96046e01a8c2..8c591f7e0d43 100644
--- a/projects/packages/premium-analytics/src/widget-modules.php
+++ b/projects/packages/premium-analytics/src/widget-modules.php
@@ -2,12 +2,10 @@
 /**
  * Dashboard widget modules: REST exposure + import-map wiring.
  *
- * Reads the widget types from Widget_Type_Registry (hydrated from the build
- * manifest in widget-types.php) and exposes them to the client through the
- * `/jetpack/v4/widget-modules` REST endpoint, plus adds each widget's render
- * and metadata modules to the dashboard page's import map so the client can
- * dynamically `import()` them on demand. The host feeds the REST records to
- * `useWidgetTypes()` in @wordpress/widget-primitives.
+ * Reads get_available_widget_types() (the registry filtered by
+ * widget-availability.php) and exposes it two ways: the
+ * `/jetpack/v4/widget-modules` REST list, and the page import map, where each
+ * widget's render and metadata modules are registered for dynamic `import()`.
  *
  * @package automattic/jetpack-premium-analytics
  */
@@ -35,14 +33,14 @@ function register_widget_modules_rest_route() {
 add_action( 'rest_api_init', __NAMESPACE__ . '\\register_widget_modules_rest_route' );
 
 /**
- * Build the REST response: one record per registered widget.
+ * Build the REST response: one record per available widget type.
  *
  * @return \WP_REST_Response
  */
 function get_widget_modules_response() {
 	$records = array();
 
-	foreach ( get_registered_widget_types() as $widget_type ) {
+	foreach ( get_available_widget_types() as $widget_type ) {
 		$records[] = array(
 			'name'          => $widget_type->name,
 			'render_module' => $widget_type->render_module,
@@ -55,20 +53,21 @@ function get_widget_modules_response() {
 }
 
 /**
- * Add registered widget modules to the dashboard page import map as dynamic
- * dependencies, so the client can `import()` them on demand.
+ * Add available widget modules to the page import map as dynamic dependencies,
+ * so the client can `import()` them on demand.
  *
  * @param array $boot_dependencies Boot dependencies for the page.
  * @return array Updated boot dependencies.
  */
 function add_widget_modules_to_boot_deps( $boot_dependencies ) {
-	foreach ( get_registered_widget_types() as $widget_type ) {
+	foreach ( get_available_widget_types() as $widget_type ) {
 		if ( ! empty( $widget_type->render_module ) ) {
 			$boot_dependencies[] = array(
 				'import' => 'dynamic',
 				'id'     => $widget_type->render_module,
 			);
 		}
+
 		if ( ! empty( $widget_type->widget_module ) ) {
 			$boot_dependencies[] = array(
 				'import' => 'dynamic',
diff --git a/projects/packages/premium-analytics/tests/php/Widget_Availability_Test.php b/projects/packages/premium-analytics/tests/php/Widget_Availability_Test.php
new file mode 100644
index 000000000000..bdc2a9bc6151
--- /dev/null
+++ b/projects/packages/premium-analytics/tests/php/Widget_Availability_Test.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * Tests for the widget type availability layer.
+ *
+ * @package automattic/jetpack-premium-analytics
+ */
+
+namespace Automattic\Jetpack\PremiumAnalytics;
+
+use PHPUnit\Framework\Attributes\CoversFunction;
+use WorDBless\BaseTestCase;
+
+require_once __DIR__ . '/../../src/widget-types.php';
+require_once __DIR__ . '/../../src/widget-availability.php';
+
+/**
+ * @covers ::Automattic\Jetpack\PremiumAnalytics\get_available_widget_types
+ * @covers ::Automattic\Jetpack\PremiumAnalytics\filter_widget_types_by_environment
+ */
+#[CoversFunction( 'Automattic\Jetpack\PremiumAnalytics\get_available_widget_types' )]
+#[CoversFunction( 'Automattic\Jetpack\PremiumAnalytics\filter_widget_types_by_environment' )]
+class Widget_Availability_Test extends BaseTestCase {
+
+	/**
+	 * In production, developer-only widget types are dropped while the rest
+	 * pass through untouched.
+	 */
+	public function test_filter_removes_dev_only_widget_in_production() {
+		// WorDBless reports the environment type as 'production' by default.
+		$this->assertSame( 'production', wp_get_environment_type() );
+
+		$widget_types = array(
+			'jpa/react-query-dev-tool' => new Widget_Type( 'jpa/react-query-dev-tool' ),
+			'jpa/hello-world'          => new Widget_Type( 'jpa/hello-world' ),
+		);
+
+		$filtered = filter_widget_types_by_environment( $widget_types );
+
+		$this->assertArrayNotHasKey( 'jpa/react-query-dev-tool', $filtered, 'Developer-only widgets must be hidden in production.' );
+		$this->assertArrayHasKey( 'jpa/hello-world', $filtered, 'Regular widgets remain available.' );
+	}
+
+	/**
+	 * Verifies get_available_widget_types() runs the registry through the
+	 * WIDGET_TYPES_FILTER so any callback can scope the visible set.
+	 */
+	public function test_get_available_widget_types_applies_filter() {
+		$registry = Widget_Type_Registry::get_instance();
+		$registry->register( 'test/sentinel' );
+
+		$callback = static function ( $widget_types ) {
+			unset( $widget_types['test/sentinel'] );
+			return $widget_types;
+		};
+		add_filter( WIDGET_TYPES_FILTER, $callback );
+
+		$available = get_available_widget_types();
+
+		remove_filter( WIDGET_TYPES_FILTER, $callback );
+		$registry->unregister( 'test/sentinel' );
+
+		$this->assertArrayNotHasKey( 'test/sentinel', $available, 'A filter callback can remove a widget type from the available set.' );
+	}
+}
diff --git a/projects/packages/premium-analytics/widgets/locations/widget.ts b/projects/packages/premium-analytics/widgets/locations/widget.ts
index afa65d07ba8a..49100a79c20c 100644
--- a/projects/packages/premium-analytics/widgets/locations/widget.ts
+++ b/projects/packages/premium-analytics/widgets/locations/widget.ts
@@ -23,7 +23,6 @@ export default {
 	name: 'jpa/locations',
 	title: __( 'Locations', 'jetpack-premium-analytics' ),
 	icon: mapMarker,
-	presentation: 'full-bleed',
 	attributes: [
 		{
 			id: 'max',
diff --git a/projects/packages/premium-analytics/widgets/react-query-dev-tool/package.json b/projects/packages/premium-analytics/widgets/react-query-dev-tool/package.json
new file mode 100644
index 000000000000..a4069b1b65ac
--- /dev/null
+++ b/projects/packages/premium-analytics/widgets/react-query-dev-tool/package.json
@@ -0,0 +1,13 @@
+{
+	"name": "@automattic/jetpack-premium-analytics-widget-react-query-dev-tool",
+	"version": "0.1.0-alpha",
+	"private": true,
+	"type": "module",
+	"dependencies": {
+		"@jetpack-premium-analytics/data": "link:../../packages/data",
+		"@tanstack/react-query-devtools": "5.90.2",
+		"@wordpress/i18n": "^6.9.0",
+		"@wordpress/icons": "^13.0.0",
+		"react": "18.3.1"
+	}
+}
diff --git a/projects/packages/premium-analytics/widgets/react-query-dev-tool/render.tsx b/projects/packages/premium-analytics/widgets/react-query-dev-tool/render.tsx
new file mode 100644
index 000000000000..35d1c5fca3cb
--- /dev/null
+++ b/projects/packages/premium-analytics/widgets/react-query-dev-tool/render.tsx
@@ -0,0 +1,31 @@
+/**
+ * External dependencies
+ */
+import { queryClient } from '@jetpack-premium-analytics/data';
+import { ReactQueryDevtoolsPanel } from '@tanstack/react-query-devtools';
+/**
+ * Internal dependencies
+ */
+import styles from './style.module.css';
+
+/**
+ * React Query Devtools as a dashboard widget.
+ *
+ * Bound to the shared `queryClient` via the explicit `client` prop rather than
+ * the React Query context. The panel renders inside this widget's own lazily
+ * loaded module, so a context lookup is not guaranteed to resolve to the
+ * dashboard's provider; passing the singleton directly always targets the real
+ * cache.
+ *
+ * Server-gated: widget-availability.php drops `jpa/react-query-dev-tool` in
+ * production, so this module is never requested there.
+ *
+ * @return {React.ReactNode} The rendered devtools panel.
+ */
+export default function ReactQueryDevTool(): React.ReactNode {
+	return (
+		<div className={ styles.root }>
+			<ReactQueryDevtoolsPanel client={ queryClient } style={ { height: '100%' } } />
+		</div>
+	);
+}
diff --git a/projects/packages/premium-analytics/widgets/react-query-dev-tool/style.module.css b/projects/packages/premium-analytics/widgets/react-query-dev-tool/style.module.css
new file mode 100644
index 000000000000..5bd9e47257a5
--- /dev/null
+++ b/projects/packages/premium-analytics/widgets/react-query-dev-tool/style.module.css
@@ -0,0 +1,5 @@
+.root {
+	height: 100%;
+	min-height: 480px;
+	overflow: auto;
+}
diff --git a/projects/packages/premium-analytics/widgets/react-query-dev-tool/widget.json b/projects/packages/premium-analytics/widgets/react-query-dev-tool/widget.json
new file mode 100644
index 000000000000..b5699f2d5d30
--- /dev/null
+++ b/projects/packages/premium-analytics/widgets/react-query-dev-tool/widget.json
@@ -0,0 +1,7 @@
+{
+	"name": "jpa/react-query-dev-tool",
+	"title": "React Query Devtools",
+	"description": "Inspect the dashboard's React Query cache. Available outside production only.",
+	"category": "developer",
+	"presentation": "full-bleed"
+}
diff --git a/projects/packages/premium-analytics/widgets/react-query-dev-tool/widget.ts b/projects/packages/premium-analytics/widgets/react-query-dev-tool/widget.ts
new file mode 100644
index 000000000000..b1286a25a698
--- /dev/null
+++ b/projects/packages/premium-analytics/widgets/react-query-dev-tool/widget.ts
@@ -0,0 +1,18 @@
+/**
+ * WordPress dependencies
+ */
+import { __ } from '@wordpress/i18n';
+import { bug } from '@wordpress/icons';
+
+/**
+ * Widget type definition.
+ *
+ * Developer tool, gated to non-production server-side by the
+ * `jetpack_premium_analytics_widget_types` filter (widget-availability.php).
+ * This metadata only describes the type for the dashboard's widget picker.
+ */
+export default {
+	name: 'jpa/react-query-dev-tool',
+	title: __( 'React Query Devtools', 'jetpack-premium-analytics' ),
+	icon: bug,
+};