Some keyboard layouts are not applied in plasma/Wayland sessions. This issue is specific to the combination of plasma and wayland. Reproducible: Always Steps to Reproduce: 1. Enable de-neo2 keyboard layout 2. log in into plasma wayland session 3. test typing Actual Results: default (en-US) keyboard layout is used Expected Results: de-neo2 keyboard layout should be used I don't know whether this issue is specific to de-neo2 keyboard layout. The same setup works fine in plasma/X11 sessions, in Gnome/X11 and in Gnome/Wayland sessions.
In wayland kwin is responsible, reassinging. Kwin Maintainer says "it's not yet implemented"
Keyboard layout configuration is implemented now.