Documentation: How to use custom keyboard on Wayland
Probably not the right place to ask for...
I found this https://help.gnome.org/users/gnome-help/stable/keyboard-layouts.html.en
I tried to modify files in /usr/share/X11/xkb/rules I can see my custom xkb symbol in KDE, and apply it on X11. KDE seems to read evdev.xml
But I don't see it in Gnome Settings So it will be great to have a doc for that.
I also played with mutter!936 (merged) It works but it is a hack...