I'm easily confused. The clients are a bit wonky here, too. As far as NOSTR goes I'm functionally ignorant.

Oh, I get it, now. I'm using Strike for this purpose and I wonder if strike is fulfilling this notification? I like Strike and Cash App for the CHEAP or Free lateral lightning sends and then I use them to consolidate UTXOS to send free to my on chain, thangs, because they are very good at that. I found that other solutions of custody or self custody really killed the cheap zaps by liquidity, management, and other things that made my own self run node risky, stressful and the loss from my mismanagement costly. I do like spinning up the Phoenix CLI on Linux and it has some nice features when I need it, including a lightning address, but that's another story.