Everything on the top panel is unreachable with only keyboard input
Hi. I just noticed, because my mouse battery was empty
After system start, you see GDM. Here the top panel does hold features like reboot, shutdown but also the accessibility menu. I couldn't figure out a key combination to reach anything of it. "Tab" only switches between users, alt+F4 does nothing, even ctrl+alt+del that triggers a shutdown dialog on gnome shells users session does nothing on GDM.
This was tested with GDM 46 on Archlinux, and GDM 45 on a Fedora VM to re-check.