Thank you for taking effort 🙏 understood the whole topic now i am very clear

One question is Does nostr zaps also face same challenges?

Zaps face a different privacy challenge: the protocol requires the sender and the recipient to identify themselves and the amount sent, and publish that info for all to see in a "zap receipt." It is possible to use zap infrastructure to send someone money without publishing a zap receipt, and this would help privacy conscious people, but I don't think anyone has built an app for that.