On LG smartphones that have a notch, the corresponding screen content around the notch can be hidden (deactivated). The screen is filled with the height of the notch with black color, making the notch invisible.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  Display
Step 3:  Tap on  New Second Screen
Step 4:  Tap on  Custom
Step 5:  Choose desired  App corners
  1. Open the Settings
  2. Tap on Display
  3. Tap on New Second Screen
  4. Tap on Custom
  5. Choose desired App corners

LG Instructions