#asknostr can someone explain to me why @npub1plstrz6dhu8q4fq0e4rjpxe2fxe5x87y2w6xpm70gh9qh5tt66kqkgkx8j@momostr.pink is not able to find this person on Nostr?

I am searching for this npub, but come up with nothing in OpenVibe: npub1vyrx2prp0mne8pczrcvv38ahn5wahsl8hlceeu3f3aqyvmu8zh5s7kfy55

When I search for the npub I only find the bluesky and mastodon accounts 🤔 😅