Search the hashtag, click on the hashtag, select follow
Discussion
I don’t have the follow button :/. I think I’ve been removed from the test flight 🥹
I’m on TestFlight zap nor sure if it’s specific to TestFlight or not. This is what I see when I select a hashtag. 
* on TestFlight, not sure if it’s specific to TestFlight or not.
You can join again 💜
The bosslady has spoken, nostr:npub1jaxs73m0zadd7fkwmkef73srdpfkxs6krwdhvkp0axzefqlsrpuqcvsjkt tell the gatekeeper to let you in or else😜
Lol it’s apple that does it I think? A few other notable ppl here have been randomly removed but were able to join back in 💜
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