Never mind found it, just had to do some digging in the github repo
https://github.com/nostr-protocol/nips/pull/1818
https://github.com/rolznz/nips/blob/feat/nip47-client-created-secret/47.md
Also we have some examples in the Alby JS SDK which might help.
Let me know if you have any questions!
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Done 😁
https://hzrd149.github.io/applesauce/examples/#nwc/auth-uri
Docs:
https://hzrd149.github.io/applesauce/wallet-connect/wallet-connect.html#using-a-nostr-walletauth-uri