I'm currently building a review system for my open source Web map https://cartes.app, based on Bluesky. Not trivial though, you have to create a lexicon and maintain a DB based on the Bluesky stream.
Bluesky _will_ enshittify sooner or later
Better go with my own DB.
Or use a network with a well-designed protocol, a hosted service, 30 million users, a social graph, moderation...
Many OSM apps will also be reluctant to adopt a closed source solution that might be closed of any moment. And under what licenses will those reviews be? As MapComplete developer, I can not and will not be adopting a system based on Bluesky
Thousands of people have already set up their own PDSes and it's inevitable managed hosts will appear soon. Blacksky just started migrating people over to its own PDS. AT's credible exit is close to reality after about two years while all the promise of ActivityPub and predecessor protocols has yet to materialize after over 15 years.