@davidrevoy My graphics tablet wasn't configurable out of the box on #Wayland as well, but it was relatively easy to create a config file that made it appear in #GNOME settings. Though I am not sure if there are all the configurations you would need (my tablet is pretty simple though).
Also I wonder why #Krita doesn't have an official #Flatpak package. I can't see anything that would be different from an AppImage...