Install the package plasma-wayland-session then reboot and select plasma wayland at the login screen.
If you want to switch back, just logout and select plasma at the login screen.
Please be aware that plasma on wayland is still considered experimental(by KDE). Depending on your use case and the applications you run, there may be some minor issues with wayland.
(For me at least) it’s much better now than previously, and I’m sticking with it. Apps launch quicker, window placement and management are much better (system tray popups are no longer treated as windows and I need much fewer window rules for apps). No crashes on right click so far (and it’s been more than a week).
The only two issues affecting me are:
I have to set a default cursor theme for my chosen one to show in the yad apps
My friend sent me this thread link few mins before. I gave it a try. To my surprise everything works fine and cpu usage is very low. Performance wise apps are loading really fast !! Only con for me is notfication. I tried playing games from steam felt like graphics were improved idk for that sure but colors were more vibrant.