Good idea

I would pay a bounty for this feature. Cake Wallet already had a full version of this feature, even though it was in the beta phase. Nostr needs this feature by default. On-chain needs to be used more and have more social use cases.

Yes there are many more now,

Silent Payments Wallet Support

Keep up to date with wallet support for Silent Payments across the Bitcoin ecosystem

I want a solution that is ready to use straight away on nostr and with it, all npubs can receive a private on-chain transaction on their profiles. Only the sender knows your public address.