So Plasma6 X.org has less graphic tablet settings, right?
Plasma 6 xorg might have the X11 KCm which is the most featureful configuration frontend for graphic tablet on linux. It is on par with windows and wacoms utility. KCM on wayland is not so much.
I would call that a regression and not a wishlist? You can for sure ask to tag those issues correctly.
I had changed the severity once but it was reverted back and then other discussion about this was not entertained you can check the bug reports see the comments marked as spam.