I don't think my setup is fully NIP57 compliant yet (waiting on BTCPay) but...

I don't think my setup is fully NIP57 compliant yet (waiting on BTCPay) but...

Sending client doesn't have to do anything for support AFAIK, so should work fine for sending :)
That worked, as Seth said the sending client is separate and can be whatever client your Nostr client supports. Damus is what I use on iOS and Amethyst on Android