I installed 22.2 on my laptop, installed waydroid, it failed to launch, so i logged out, selected ubuntu on wayland, and waydroid works in that DE.
I installed 22.2 on my friend's laptop(way older), and 3 cinammon DEs were included but not the ubuntu DEs, so i can't open waydroid on the second laptop.
I don't remember installing cinnamon any differently in the first or second laptop, did i somehow install ubuntu DEs on cinammon on the first laptop?
I tried cinammon on wayland, but it launches into n unresponsive black screen.
You probably installed GNOME on first laptop but didn't notice (or it came ad a dependency with something else). However, you only need Wayland to run Waydroid, so any DE or WM that made for Wayland should work. On the other hand, Cinnamon is still on X11. You cannot run Waydroid on X11, hence the black screen.
Cinnamon can run on Wayland but it's still experimental. You can install any Wayland DE of your choice, not just "Ubuntu DE", which is kind of heavier than others, but it's fine if you want that.
save