UPDATE - seems like this is already partially working:

-  nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955 displays zapper image and zap message
-  nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg and  nostr:npub1nz64zngcqm8vj8nhrdkcjpfwn2rcaqysnxec88tqfclp5afrpglsqm0w5y display zap message

I guess it's not too much of a lift to add zap sender and recipient to the embedded notes?

nostr:note10ldm4vswgf3d4s6muarrd9mrvzmrftkxvug3df6r37jl035y7snspv83xj