Created attachment 875987 [details]
Log of text session using  xterm as example not working

Fresh install of openSUSE Leap 15.6 - Gnome, Wayland

System is set to German  and German keyboard layout.
Gnome/GTK application seem to use correctly German keyboard layout. Other
applications like e.g. Chrome, Thunderbird using  US keyboard layout.

Using Yast -> Hardware -> Keyboard (or in German Tastatur) the keyboard setting
is German.  

Using the textbox, it is using US (QWERTY) not German (QWERTZ) layout.
Switching back and forth via any other layout the textbox is using German
layout (QWERTZ). 

Using now already running Chrome, it is using now German Layout. No restart
needed, which hints for an issue in Wayland/X. Unfortunately the setting is not
surviving a reboot nor an logout/login.

xterm as well suffers from the issue. I will attach a log of my changes. 

It seems we do not set the correct keymap for X/Wayland but just for GTK.

The issue seems to be present for more users and seem to hit as well upgrades -
See:
https://forums.opensuse.org/t/wrong-keyboard-layout-on-most-applications-after-fresh-install/175773