This question immediately make me think of TikTok's new data policy. Essentially, they keep track of thinks like sexual orientation, gender, and immigration-status / visa-status. A lot of users were immediately considered, especially with current events such as ICE involvement. I think keeping track of citizenship/visas/etc is vile, and is a one-way ticket to tracking down individuals through social media.
None of this really shocked me, I was very aware that social media has me pinned and knows exactly who I am and what I like. I've gotten posts about birthdays near my birthday, posts about what exact age I am, my major, what I enjoy and my hobbies, what I am currently doing professionally and personally. As much as I like my FYP, it is scary.
Additionally, one aspect that freaks me out a bit more is that I could be having a spoken conversation with friends or family and the same topic appears on my FYP within 10 minutes. If they do keep track of audio/video through my camera and microphone, I believe that is a severe invasion of privacy and should not be happening.