Hello,
The update to kde plasma6 went without any major problems, the only problem I encountered was the display on the screen of the kde system font, the various tests of changing the font n were not satisfactory. Just that I notice on the kde SDDM login screen at the top left the plasma wayland indication. I change wayland plasma to plasma X11 and all the font display problems have disappeared.
My question is why KDE didn't automatically detect that I was using X11 and not Wayland.?