xdg-desktop-portal-kde VS sddm

However, the actual dialogs and access points are provided by a backend, which differs from what desktop are you using. For example, Gnome uses xdg-desktop-portal-gtk, KDE uses xdg-desktop-portal-kde and so on.\ If there is an issue with the implementation of an portal, you need to find the backend you use and report it to them.

There is some code being worked on for the KDR settings portal: https://github.com/KDE/xdg-desktop-portal-kde/commit/77945523b854678d4ff9facb2acb5de8a43377f5

It looks like a kde specific issue. xdg-desktop-portal-kde has window sharing on its to do list.

Well, it seems it is still considered experimental https://github.com/sddm/sddm/pull/1737

There are dozens of threads everywhere about it since around early 2021. KDE will take over the SDDM project and that bug fix may soon finally be up-streamed.

LMAO the login issue was this https://github.com/sddm/sddm/issues/1592

Wayland autologin does not work with sddm (if you're using such a configuration) https://github.com/sddm/sddm/issues/1676

Thanks everyone for your time - installing xorg-minimal solved the issue; next version should solve the issue topic discussed in sddm github. I leave the following here just in case someone with skill & time comes across - seems a bit of love would not hurt sddm: https://github.com/sddm/sddm/issues/1471

Relevant to your keyboard configuration issue: https://github.com/sddm/sddm/issues/703

Also fixed in -git

No, the picture shows that the login manager is still sddm, but somehow the login theme used by sddm has been reverted to the sddm default of the 'maui' instead of the 'breeze' theme used by default in Kubuntu. The package shipping the breeze theme (sddm-theme-breeze) may have become uninstalled, or sddm config changed somehow to not use breeze.