Wayland is just hard work
We live in 2025 and it's still easier to write an X window manager from scratch than it is to create a Wayland Compositor from scratch. The scope of a Wayland Compositor is much greater in terms of features that have to be included.
This disconnect is why only the larger, in terms of developers, desktops have ended up being 'ported' over. As such I very much appreciate the effort to not leave a large chunk of interesting and usable desktops behind.