Several factors could contribute to this issue, and here are steps to troubleshoot and potentially resolve the problem:
Check Internet Connection:Ensure that your phone has a stable and active internet connection, either through mobile data or Wi-Fi. Push notifications require an internet connection to be received.
App-Specific Settings:Check the notification settings within the specific apps that should be sending push notifications. Ensure that notifications are enabled for those apps.
Battery Optimization:Some phones have battery optimization features that may restrict background processes, affecting push notifications. Go to your phone's settings and disable battery optimization for relevant apps.
App Updates:Ensure that the apps experiencing push notification issues are updated to their latest versions. Developers often release updates to address bugs and improve functionality.
Background Data Restriction:On Android devices, check if there are restrictions on background data usage for specific apps. Adjust these settings to allow data usage in the background.
App Permissions:Verify that the apps have the necessary permissions to send notifications. Check both app-specific settings and general phone settings for app permissions.

Clear App Cache:Clear the cache for the apps facing notification issues.
Check Notification Settings (iOS):On iOS devices, navigate to "Settings > Notifications" and ensure that the desired apps have notification permissions.
Restart Your Phone:A simple restart can often resolve various issues.