My zap attempts aren't going through on this note of yours?
Ecash definitely not necessary for this. If you're using Android, Amethyst and Primal both have one tap zaps and NWC support (which allows you to pull from a wallet that is external to the Nostr client)
I use Alby Hub on my windows desktop as my lightning wallet and set a budget of up to 30k sats a day, one tap zapping. I can connect this to any NWC app. Here's what it looks like in action https://video.nostr.build/cc272986d2af6dd3714422c8526e649f399a8844499c8275a9e566e010e56aad.mp4
Discussion
Sometime I forget to leave my Alby Hub open I think lol