Yeah I also did that in olas and it works fine there. The zap icon just doesn't show
You created a NWC string from nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg and pasted it into nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955 the Wallet settings?
I’ve tried this with other apps like nostr:npub1yfg0d955c2jrj2080ew7pa4xrtj7x7s7umt28wh0zurwmxgpyj9shwv6vg and it works fine.
Discussion
You can also try nostr:npub1yzvxlwp7wawed5vgefwfmugvumtp8c8t0etk3g8sky4n0ndvyxesnxrf8q’s. They have a wallet you can use with no KYC.