I would like to request the ability to customize the shutdown/logout/Ctrl+Alt+Del screen in KDE Plasma. Currently, this screen displays the user avatar, name and 2 buttons (or 5 if you entered said screen using the Ctrl+Alt+Del key combination). I propose adding an option to be able to add for example widgets to that screen.
This is unfortunately not something we intend to add. There's a balance of overhead with customisation.