Gonna put my feedback here as it’s on the subject.
It’s still confusing to open Retroarch on Android and getting this Java stuff while it’s now deprecated.
Then, getting in GLUI (that I read is now ready for touchscreen) has touchscreen disabled and uses the pad overlay.
The evil keyboard icon in the middle of the overlay:
if you’re only using touchscreen and touch this thing, get ready to use your home button and then find a way to force close retroarch to get any form of control back at restart.
When I managed to get touchscreen control in GLUI it was quite irresponsive and the lack of “smooth scrolling” didn’t help.
But I’m sure everything will get better in due time and everything worked well passed those annoyances (which could stop 1st time users from getting into retroarch I fear).