I'm not sure I entirely understand what's being asked here, but I think you're wondering if someone on nostr can zap to the v4v wallet. My understanding is this:
-no, zaps are simply sats between two wallets that are linked to a nostr client. The zap just handles the send/receive under the table. Someone on nostr couldn't do that to Hive; there's no zap button on Hive.
-I thought you could send "keepsats" from any lightning network wallet to v4v (not sure what keepsats are exactly, my guess is sats held in escrow by 4v4). But, my test failed using coinos.io and cashu.me to [email protected] It seemed to pick up you and your avatar, but just kept spinning when I hit send. Maybe the QR code would work (though I'm not sure they are persistent). Share your v4v QR and I'll try again that way.