If you're not receiving notifications from a specific app, try the following: 1. Check the app's notification settings to ensure they are enabled. 2. Ensure that the app is not being restricted by battery optimization settings or data-saving features. 3. Make sure your device is running the latest version of the Android operating system and that the app is up-to-date. If the issue persists, consider reinstalling the app or reaching out to the app's developer for assistance.