In order to work together to port MATE applications to run on Wayland, the developers of the Mir display server and the MATE desktop have teamed up. They have already prepared mate-wayland snap package, which is a Wayland-based MATE environment. True, for its everyday use it is necessary to carry out work on porting end applications to Wayland.
Another issue is that many MATE applications use X11 bindings and need to be converted to use fully portable GTK3 code. In order to attract enthusiasts to porting, the Mir developers have prepared a guide that tells how to set up the Wayland-based MATE desktop environment and what you should pay attention to. The instructions also offer typical solutions for replacing bindings to X11.
Source: linux.org.ru