FWIW I was playing around with Wayland.
I have a dot local bin file to start Weston and another one to start Sway (yet to submit as its not stable)
So I started Weston and in the terminal, I ran my dot local command to start sway and it worked.
So I then opened another terminal and took a screenshot proving I had Weston as the host and sway as the guest.
a link to screenshot to anyone interested.
https://imgur.com/a/4FZMRmVthanks for reading