They deliver goods to big box stores, not to the kinds of stores one finds in a dense, walkable downtown core area. I have worked in the delivery industry, and we served the downtown core entirely with 5-ton and 3-ton trucks and cargo vans. It’s simply not practical to get a full-sized trailer in there.
I usually right click the window in the app bar and choose the “stay on top” option. This issue only happens in Wayland, also. in X11 it stays on top as expected.