following previous article about using Waydroid on X11, I finally managed to have XFCE working on Wayland. It's in experimental state since XFCE 4.20. It looks like labwc package was just missing in my case, or that's maybe due to recente update of some XFCE components on Arch. I use mainly Arch Linux ARM on a RK3588 SoC since about 6 months.
Update 2028-09-01, I managed to have XFCE4 working on Wayland on this hardware, probably due to recent XFCE updates. It use labwc as compositor, that depend itself on wlroots. Still have some limitation (keyboard forced to english, no mean to switch (keyboard and iBus should depend on labwc or wlroots layers), parameters not available at least on menus, no screensaver/locker, see also one of the XFCE4 author's blog entry for more details), so I will wrote a new article about some tweaks in this case