Follow these steps to diagnose the issue:
Step 1: Open the ADDA App.
Step 2: Tap on the Bell icon (top right).
Step 3: Tap on "Missing out on a few notifications?"
The App will automatically check the required settings and permissions. and, It will suggest the necessary changes.
Once you apply them, you will receive a Test Visitor Approval notification.
If you are still facing notification issues, please try the following from the same page: