@kugiigi Thanks, I'll give it a try.
I found a rather crude way to restart the keyboard, using the Fcitx5 app I installed in an attempt to find an alternative keyboard. Fcitx5 isn't really reliable yet, but with it I was able to restore the default keyboard (restore button in the settings of the app), and that works fine.
As to your guess: No, no external keyboard is detected, an no keyboard icon appears in the top bar. Only difference I notice is that the time display disappears in the top bar or shows a wrong time in UT, while in waydroid it is correct, but that's a different story...