nostr:npub143y47cffsm9wl2gsh8hw5kr4ldx5vntmwwznqfcm4h5vpzv0dr0qpev59m I think what you’re looking for is a “Locked account.” You can still make public posts for everyone to see, or you can post only to your followers, and with a locked account, you have to approve each follower.

https://docs.joinmastodon.org/user/profile/#locked