In order to provide a more immersive user experience, the phone can also optimize the display of apps that are not adapted to the full screen.
Setting path:
realme UI 4.0 & above versions: Settings > Display & brightness > Full screen for apps
realme UI 3.0 & 2.0 & 1.0: Settings > Display & brightness > Screen display
realme UI Go & R & S & T & U edition: not support