Please read the article. The data in question, besides the IP that I don't see how they can get since it's coming from your instance and not the user directly, is the bare minimum that's required for AP to even work, and it is the same data that every federated instance is already storing and propagating. The author of the article says as much.
Facebook is a shit company but the privacy of this data is not one of the issues with it. As has been said before already, all of this is already very public, very easy to scrape and it is impossible to prevent it, if you want to keep your profile picture, username and comments private then dont upload them to a federated social network... or well, any social or network at all.
How is elden ring's performance on steam deck?