How to disable gestures to switch apps on iOS

I play some games. Some are online and those games have lots of tapping and swiping involved. However, the gestures to close apps or switch apps make it so that I leave the game and get disconnected momentarily. This makes it so if I’m winning a round I’m suddenly loosing when I swipe back into the game.

I’m sure there’s a way to turn it off. However, I can’t figure out how to turn it off on iPhone. Where’s the setting to do that?