Probably more about their general user tracking than that tbh. Meta has always had profiles for everyone because of Facebook/meta integrations on every website

Nobara is great, based on fedora so very stable and fairly up to date with many built in gaming features and no after install setup required to get gaming. https://nobaraproject.org/

Running it for over a year now on my gaming rig and very happy

Doesn’t matter, you are still effected by this issue since any images from communities you or anyone else on your instance follows get cached on your server, doesn’t matter if you actually looked at them or not. I would advise you to look into this if you are the instance admin and didn’t know this by now.