Facebook App Notifications Not Working. Once the facebook app is updated successfully, then again open the app and check if now the app is working or not. Notifications are what let you know what’s happening on facebook.

Report that something that isn’t working directly to facebook’s customer care team. To receive the notifications from facebook, you need to turn on the feature on your phone at first. If not, you can enable it then you can receive the notifications normally.
Now, recently, some users reported that messenger is not showing notifications on their android devices.
Imyfone fixppo is a handy tool that can fix plenty of issues that might occur in ios. If you use the facebook app on a mobile device: You will now see all the apps which push notifications regularly on your iphone. Even though facebook suffered significant drops in the number of active users, facebook messenger is still holding up.