You can also use its forked version here: https://github.com/debauchee/barrier

I use this between my Windows, Mac and Wayland(Sway) computers.

Barrier is succeeded by input-leap

https://github.com/input-leap/input-leap

It... doesn't work with wayland? At least not as far as I've been able to get working

Hmm I could be mistaken, perhaps it was when I still was on X..