On the Xiaomi smartphone, we can allow individual apps to start in full screen mode. if we want to disable this feature, we can set the setting for each app individually. the Xiaomi device also suggests which apps work well and not well in full screen mode.

Android 10 (MIUI 12.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Display
Step 3:  Tap on  Fullscreen mode
Step 4:  Enable or disable an  app
  1. Open the Settings
  2. Tap on Display
  3. Tap on Fullscreen mode
  4. Enable or disable an app

Xiaomi Instructions