I just realized that nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5 added self-custodial lightning addresses about a month ago.

It makes it possible to receive payments while offline!

In the Zeus app it reads:

"It uses payment hashes generated on your device, and hodl invoices, which means the LSP can only temporarily hold the funds and forward them along to you, or return them to the sender (after a 24-hour expiry period), effectively making it self-custodial."

It is using Zaplocker:

https://github.com/supertestnet/zaplocker#four-problems-zaplocker-solves