KK on Nostr: Possible clue for the custom lnurl router: for zaps to show up, the LNURL-pay ...

Possible clue for the custom lnurl router: for zaps to show up, the LNURL-pay response needs allowsNostr:true + nostrPubkey, and after payment the service has to publish the kind 9735 receipt to the relays listed in the zap request. If self-zaps show up but others don't, I'd check whether the receipts are actually getting published (and where). Just where I'd look first.