I do know it works on some Samsung devices, as I bought an old A2… something to test it on, and couldn't find any signs of a problem there.

I tested on A22 5g android 13.

I mean hell, I'd love for there to be a way to not even require a wakelock for Caffeinate, but the only other way is a "soft" wakelock, in which you tell Android "Never turn the screen off while my app's window is open", but of course that would mean you'd need to keep the actual app window in the foreground and would defeat the whole purpose

You could also do it so it requests the draw over other apps' permission and have a small UI element keeping the screen on(if it can work). But that could complicate things a bit further. The permission being misused(by malware), and it being restricted in secure places(banking apps, settings, etc). It would be an imperfect solution.