Hey Joyo, hashtags often aren’t rendered in bios, but it depends entirely on the app. It’s a protocol, and all clients can choose most UI/UX decisions based on their desires.

There is no formal verification for Nostr accounts. Usually a post from an existing platform is an indicator. If you own a domain, you can also use that to prove control of that domain.

Lots is still new here.. so things can always be improved or reimagined.