Posts on the federated timeline show up for a user under 2 conditions:
1) If someone else on your instance follows that user, their public posts will show up in your federated timeline! Think "Friends of friends".
2) If your instance is connected to a relay, all public posts from instances using that relay will show up in your federated timeline.
Beach City is our private beach-side sanctuary for close friends and awesome folks. We are various flavors of trans, queer, non-binary, polyamorous, disabled, furry, etc.