Game mode is on almost all android phone's & Apple is too expensive in my country so no idea if they offer anything. If you are android and on Android 10 or newer (most need android 11 but there are many phones with the mode prior to 11) go to settings and search Game. It makes the phone "focus" on the game and you generally have options that would be perfect for your needs. I do some coding and it's not as simple as making a button.
The permissions the game would need may need core aspects of how the game interacts with the device. It's something they can likely add in the future but for now try the search and if that fails there are apps available for Android.
I installed this to try and you can whitelist contacts and numbers you deem important so they can still call. It's not the best but maybe if you have no other options.
It only has ads and no purchases so that's a good thing. Here is a link. GG. 🙂 Game mode booster app.
So I just took the glass off mine and holy crap, it works!
I'm replacing my glass cover with a clear film one like this https://www.amazon.com/dp/B09CYNDPGW?psc=1&smid=A3ERO5WWGZCNON&ref_=chk_typ_imgToDp
I've had this brand in the past and haven't had any problems with other games -- though I've only played this game on this phone with this protector for now.
I can report back after I get it and test it out.
But for now, no cover = nice.