MUUN only allows the creation of invoices that have an expiration date. That won’t work with Nostr as you need a static address that won’t change.
I use WoS for Nostr and keep most of my sats in MUUN as it’s a custodial wallet.
Discussion
When I was using WoS peeps got this message
why would this message appear ?? Any guesses??
WOS has 3 options to receive. Lightning, Bitcoin and lightning address. Pick the last one.
It will generate an address and an alias that looks like an email. You can use either on your profile but the email Alias is more human friendly.