waydroid requires a kernel module or a kernel with support built in like zen https://wiki.archlinux.org/title/Waydroid#Kernel_Modules

From a quick look at the gitlab I don't see any mention of similar requirements. If that's the case, it would be easier to run. Also bonus if gpu support is better than "NVIDIA GPUs do not work currently"

But I thought the experience with waydroid is running an android system in a window? You can run android applications directly in Linux as their own "native" window using waydroid?

native wayland windows maybe you're thinking? still, it has the requirements that it does (see the wiki link)

you still need to be on linux-zen kernel to make this work.

I use wayland but I am interested in atl as well

Yes, you can have Android apps showing up in Gnome (e.g., likely all DEs) menu and open them directly in their own window without seeing the waydroid launcher.