OPPO A54s
Android 11.0
1 Find "Notification & status bar"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Notification & status bar.
2 Turn notifications on or off
Press Manage notifications.
Press the indicators next to the required apps to turn the function on or off.
3 Return to the home screen
Press the Home key to return to the home screen.