Plasma 6 landed in opensuse. However, I recommend to do it in tty because if you do it in plasma the upgrade will be incomplete because the shell will crash in the middle of update without installing all. In case this happen to anyone, just reinstall plasma 6 pattern and it will go without problems
Yeah, when I saw the update I canceled, logged out and ran zypper dup from a tty. Rebooted and logged into a Plasma 6/Wayland session. Went swimmingly.
I think this kind of update is where “atomics”/immutables really shine. Install the update on a new separate snapshot and activate it at boot.