I found something with the GNOME app Evolution. It uses Systemd to start services. I found I have to start:

/usr/lib/evolution/evolution-addressbook-factory
/usr/lib/evolution/evolution-calendar-factory
/usr/lib/evolution/evolution-source-registry
/usr/lib/evolution/evolution-user-prompter

in order to use it. The package 'evolution-data-server'

AFAIK GNOME more and more depends on Systemd for starting desktop services, while Plasma – which I use and which works with elogind as well – still relies on 'kdeinit' for that. So there may be other desktop services used on GNOME not running.

golinux is right, I am not so much of a forum user, even though FluxBB appears to be quite clean and simple. And nicely enough uBlock Origin with hardened settings is completely quiet on this page . Rare, very rare these days. So do not expect timely answers.