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.
Whenever it happens, assuming it does, we’ll consider switching defaults. We’ll use the best tools to do the job and provide the best experience. Today that means Xorg. Tomorrow it might mean Wayland. Cinnamon and Linux Mint will be ready and compatible with both.