When using the Samsung device, incoming calls are displayed in a pop-up window at the top of the screen, and the phone settings allow you to change the call display to a mini pop-up or even full screen.

Android 10 (One UI 2.0)
Step 1:  Open the  Phone-App
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  Call display while using apps
Step 5:  Choose between  Full screen ,  Pop-up  and  Mini pop-up
  1. Open the Phone-App
  2. Open the menu
  3. Open the Settings
  4. Tap on Call display while using apps
  5. Choose between Full screen, Pop-up and Mini pop-up

Samsung Instructions
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