Can’t you just sign in with nip-07 and zap away?
Discussion
Mm only two options when I hit Login was Create Acct or Login with Private Key 
Do you have a login extension on your broswer? It seems like the option won’t show up unless you do. On iOS check out nostore
Ok I just realized I have Private browsing set as my default so my Alby Extension wasn’t working. I had to give it permission to run in private windows.. now I can sign in with that.
Still wonder if there is a way to zap from Mutiny on zap.stream tho?
Hmmm not sure tbh. I would imagine it’s possible though