If updates are offered in the backend, there should actually be a changelog that can be viewed directly.
But usually that is not the case. It takes days until the changelog is visible on the public pages!
For example, I have an update for Pagebuilder to version 3.8.1 in the backend. I can find the changelog under Downloads when I log into my account.
There is also an update for Helix Ultimate Framework 2.0.6 in the backend, but I can't find any information about it.
I had to find out that the versions do not work for me and an important work programme (Events Booking) is no longer functional.
This refers exclusively to Events Booking!
Another note: If you work with 3.8.1 and 2.0.6, PageBuilder behaves strangely in frontend editing. When working, it calls up the pages as they are actually to be seen in the frontend. This means that it does not display the tables that can be set as usual, but jumps to the original page when working within PageBuilder. You can see this because the page displays "Edit page", even though you are already doing this.
I have not received any feedback here and have read back a backup. Now I am working again with 3.7.15 and 2.0.5.
The current versions don't seem to be mature yet. Maybe that's why there is no info/changelog or hint on the Joomshaper pages.
Ticket closed, I helped myself.