My following list is already a bit too long for that I think, and I'm not sure if it's 100% meatspace humans.

I do try to more actively look at people I follow. E.g. I check who they follow, because they may follow someone interesting but "only" like/zap their posts, which I wouldn't see. I also peruse the profiles of those who interact with me (follow them, or someone they recently boosted).

And I should try the conversations tab a bit more, where you can see who the people you follow are replying to (varies a bit by client..

It takes a bit more manual work than with X because there's not much spontaneous recommendation going on.