There are a number of traditional Facebook alternatives in the fediverse... if that's what you seek. Don't expect the same level of commercial focus as the Twitter alternatives. The Facebook-based platforms are usually more focused on online safety, family-friendly spaces, and identity management/resilience.
https://codeberg.org/streams/streamshttps://framagit.com/hubzilla/corehttps://github.com/friendica/friendica https://github.com/grishka/smithereenhttps://codeberg.org/fortified/forteEvents only:
https://github.com/framasoft/mobilizon