Can the menu bar shrink as I scroll?

Yes, on an iPhone with iOS 26 or later. Go to Profile, then Customise, and under Appearance turn on Shrink the menu bar as you scroll.

The menu bar at the bottom then gets smaller as you scroll, so you see more of the screen. Scroll back up or tap it, and it comes back.

It starts off, and it’s a setting for this phone. On Android and iPad the menu bar always stays full size.