Yes but you have to have an admin that is managing federation.

I don't know much about it but the mastodon server I am on, the admin is doing a lot of manual curation of servers that are federated. I don't know the lineage but like for example newsie.social was an instance that was federated and then they started syndicating content from like OANN or whatever and the admin had to deal with that.

It's not as simple as "oh just join a socialist one"