AFAIK it ain't possible yet. Only LN address payments (which has been possible since pre-Nostr
Discussion
What do you think needs to be done to make it possible?
Just for self hosted LNURL software to support NIP57 I think. There's a bounty being built for this on BTCPay.
https://github.com/btcpayserver/btcpayserver/discussions/4642