You haven't put your pub key into Hive yet? Instructions at the end of this post: @brianoflondon/what-is-nostr-and-why-is-it-exploding-a-guide-for-hiveans

You put your pub key into your profile on Hive and then you can use [email protected] as a NIP-05 verified ID. You can also use that as a lightning address but I'm advising not to for zaps, post coming soon.