in my opinion:

1. Arch Linux - great, fast updates. However, after a long break, updating can be complicated. Everything a person can do their own way. Very fast and efficient. AUR is sometimes a lifesaver
2. OpenSuse Tumbleweed - obs is great (better than aur). Sluggish. Snapshots make updating seamless even after a year of non-use. I don’t like yast.

But what advantages does friendica have over hubzilla?

SP6INA it is simply my ham radio sign :)

Yes and no. In most cases there are no problems, but there can be errors where you need to use the command line.

Fedora rawhide on laptop and Fedora 34 on PC. All witch Gnome.

Hosting www plus hubzilla or friendica its easyer way imho

Yes but Fedora 34 have many bugs i thing the 33 or 32 have it less.