What is broken for you? At this point, starting from roughly KDE 6, Wayland has been pretty much flawless for me. KDE 5.27 was pretty much fine already as well.
Just installed fresh and logged in to Wayland. Sudo password stopped working. After fixing that it kept opening some window and refused to close. Even without those bugs none of the accessibility tools work.
Fractional scaling is awful on Wayland if the application relies on XWayland to work. Drives me up the wall having to find the various flags to force Wayland mode.
