M3 and M4 haven't been supported yet because they weren't a priority (looks like they've been focusing on gaming support for the last year or so). Alyssa said

M3 and M4 haven't been supported yet because they weren't a priority (looks like they've been focusing on gaming support for the last year or so). Alyssa said in her talk that they'll probably get it working in 6 months or so: https://www.youtube.com/watch?v=pDsksRBLXPk&t=2932s https://www.youtube.com/watch?v=pDsksRBLXPk&t=2932s