This is particularly important for games.
Can you hide the multitasking indicator "..." in iPadOS 15?
I noticed it on some apps that don't actually support multitasking. Perhaps there it is on by default although it isn't there on the home screen....
You can overwrite the top view controller's prefersHomeIndicatorAutoHidden method and return YES. That auto-hides the home indicator for devices that have one, but also apparently auto-hides the multitasking menu on iPads with iPadOS 15, even if they don't have a home indicator.