If the full screen display is not activated for an app, the status bar and the navigation bar will still be displayed, but if the app is to run in full screen, this must be specified in the settings.

Android 10 (ColorOS 7.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Display & brightness
Step 3:  Tap on  Screen display
Step 4:  Tap on  Full screen display by app
  1. Open the Settings
  2. Tap on Display & brightness
  3. Tap on Screen display
  4. Tap on Full screen display by app

Oppo Instructions
Loading...

Transmitting...