i am on a niche server (as i am on most fedi platforms) because it was the sheer volume of review-dunking that chased me off goodreads, long before bozo bought it. so when i went back to book social, i started out hiding in a corner and never left.
https://book.dansmonorage.blue/user/emmadilemma
federation on bookwyrm seems more hit-and-miss than on other platforms, so the instance you're on makes a difference. most people i know are on books.theunseencity and bookrastinating; i keep a secondary on the latter to see some updates that don't flow well to dansmonorage