Mint Wayland support is experimental and was released in Mint 21.3 ~3 months ago
The Wayland session isn't as stable as the default (X11) one. It lacks features and it comes with its own limitations.
It was added as a preview for people interested in Wayland and as an easy way for them to test if they want to give us feedback.
A board was set up to keep track of Wayland development. It’s available at https://trello.com/b/HHs01Pab/cinnamon-wayland.
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.
Hopefully the stable version will become a competitor to Linux Mint