diff --git a/plugins/app/src/extensions/index.ts b/plugins/app/src/extensions/index.ts
new file mode 100644
index 0000000000..85efe58515
--- /dev/null
+++ b/plugins/app/src/extensions/index.ts
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2024 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+export { App } from './App';
+export { AppLanguageApi } from './AppLanguageApi';
+export { AppLayout } from './AppLayout';
+export { AppNav } from './AppNav';
+export { AppRoot } from './AppRoot';
+export { AppRoutes } from './AppRoutes';
+export { AppThemeApi } from './AppThemeApi';
+export { ComponentsApi } from './ComponentsApi';
+export { IconsApi } from './IconsApi';
+export { FeatureFlagsApi } from './FeatureFlagsApi';
+export { TranslationsApi } from './TranslationsApi';
+export {
+  DefaultProgressComponent,
+  DefaultErrorBoundaryComponent,
+  DefaultNotFoundErrorPageComponent,
+} from './components';
+export {
+  oauthRequestDialogAppRootElement,
+  alertDisplayAppRootElement,
+} from './elements';
diff --git a/plugins/app/src/plugin.ts b/plugins/app/src/plugin.ts
index 2c032bcb5e..ff0c69faec 100644
--- a/plugins/app/src/plugin.ts
+++ b/plugins/app/src/plugin.ts
@@ -13,9 +13,52 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { createFrontendPlugin } from '@backstage/frontend-plugin-api';
 
+import { createFrontendPlugin } from '@backstage/frontend-plugin-api';
+import {
+  App,
+  AppLanguageApi,
+  AppLayout,
+  AppNav,
+  AppRoot,
+  AppRoutes,
+  AppThemeApi,
+  DarkTheme,
+  LightTheme,
+  ComponentsApi,
+  IconsApi,
+  FeatureFlagsApi,
+  TranslationsApi,
+  DefaultProgressComponent,
+  DefaultNotFoundErrorPageComponent,
+  DefaultErrorBoundaryComponent,
+  oauthRequestDialogAppRootElement,
+  alertDisplayAppRootElement,
+} from './extensions';
+import { apis } from './defaultApis';
+
+/** @public */
 export const appPlugin = createFrontendPlugin({
   id: 'app',
-  extensions: [],
+  extensions: [
+    ...apis,
+    App,
+    AppLanguageApi,
+    AppLayout,
+    AppNav,
+    AppRoot,
+    AppRoutes,
+    AppThemeApi,
+    DarkTheme,
+    LightTheme,
+    ComponentsApi,
+    IconsApi,
+    FeatureFlagsApi,
+    TranslationsApi,
+    DefaultProgressComponent,
+    DefaultNotFoundErrorPageComponent,
+    DefaultErrorBoundaryComponent,
+    oauthRequestDialogAppRootElement,
+    alertDisplayAppRootElement,
+  ],
 });