AlphaElwedritsch
If you could. Run the following commands one at a time and see if any of them are taking a long time. These are what run on load and would like to see what is holding yours up. could also tell if there are any issues. It seems like a eopkg cache issue at first glance, but hard to tell...
Update Checks
pkcon refresh force
pkcon get-updates --plain | grep -E -c "\(Solus\)|\(Unstable\)"
Flatpaks
flatpak list --app --columns=application,name
flatpak remote-ls --system flathub --columns=application,name
Solus
eopkg li
eopkg la -U -N
The last one should be the longest as it is what gets all the packages, not installed on the system.
I am looking at having the last one first look at the local index cache, if it is available at the time of checking and only going to full check if needed. But that will need to be tested so may be an experimental setting in the near future. It would drastically speed things up.