I was confused as well. First time I saw it, it looked like a layout bug, with buttons under the "home bar" indicator. Dragging upward has a rubbery effect, wh

I was confused as well. First time I saw it, it looked like a layout bug, with buttons under the "home bar" indicator. Dragging upward has a rubbery effect, where it jumps back if you don't drag far enough. And if you start dragging too low, the whole app goes away. That share sheet is a disaster.