A dedicated Github repository was created for issues related to Wayland, whether they need fixing in Cinnamon, in an XApp project, a Mint tool or anything software project we maintain: https://github.com/linuxmint/wayland.
In terms of timing Wayland support doesn't need to be fully ready (i.e. to be a better Cinnamon option for most people) before 2026 (Mint 23.x). That leaves us 2 years to identify and to fix all the issues. It’s something we’ll continue to work on and improve release after release.
Mint Wayland support is experimental and was released in Mint 21.3 ~3 months ago
https://www.linuxmint.com/rel_virginia_whatsnew.php