Does FreeBSD even support Wayland? I heard that there is some work.

Yes, they have official docs on how to set it up and use it.

https://docs.freebsd.org/en/books/handbook/wayland/

Here's a 3 year old article going through their freebsd/wayland setup, so it seems like it's been supported for a while now.

https://forums.freebsd.org/threads/example-tutorial-pure-way...