You're correct. There is a delay. I'm keeping Mutiny open and it seems to take about 10 minutes. There is no need to confirm each transaction, unlike Alby. I believe a similar delay occurs with SN wallet. We just don't see it. 

siggy47

I was under the impression the nostr event that tells Mutiny to zap gets sent immediately (and then Primal shows it was sent). But the next time you open Mutiny (unless it’s still running in the background, or running on another device), all of those payments actually get sent out (automatically, not needing to approve each one). Maybe I’m mistaken. Will have to test it out again. 

ACYK

Using Mutiny For Zaps On SN? 

I have not set up a federation. My mutiny wallet zaps immediately on primal. I don't have to go back to the wallet for each zap. 