How to show Camera cutout(hide black screen at camera portion) while gaming?

[Sobin78]

Some games like eFootball shows a black screen around the camera portion. How to hide that? 

Hide/Show camera cutout option in Display settings is not working..

Thinks that; On OneUI6, there's an another option to force apps to full screen. OneUI7 don't have that.

[Wodehouse]

This is app dependent.so select the apps ( game) and toggle. See screen shot given as an example

If this answered your query please tap 3 vertical dots to the right of my reply and tap resolved. Thank you 😊

[Sobin78]

Already done that, but it's not working 😢