"Back" button is extremely small in UI and cut off by rounded screen corner

In the “Play” screen, and also in the “Settings” screen, the “Back” button is very small, in the top-right corner. The phone I’m using (POCO X6 Pro) has rounded corners, and also I have a phone case with the edged raised a bit over the screen (the standard case that came with the phone actually). Because of this, the Back button can’t be touched physically, as it’s a small area just below the phone case edge.

It’s bad UI/UX for mobile devices - all buttons should be big enough to be touched.