OPPO A57 4G
Android 12.0
1 Find "App management"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Apps.
Press App management.
2 Turn notifications on or off
Press the required app.
Press Manage notifications.
Press the indicator next to "Allow notifications" to turn the function on or off.
3 Return to the home screen
Press the Home key to return to the home screen.