I use Wafrn and I don't know how exactly the devs did it, but wafrn gives you the ability to enable a bluesky account and interact with people there without being in the official server.
I particularly don't have it enabled because I don't care for it, it's basically twitter 2.0 and I hated twitter. So I have no intention to engage in or with a place that's basically ""decentralised" twitter", but it's there and it's opt-in.