Go to the web page on your iPhone and enable zaps. It will run a script to enable zaps. I was hesitant but the developer of Damus himself told me about it. It worked for me. You still need the Alby connection too 

 Can you try zapping me please to test it out. 

 Awesome it worked. I’ll send back 

 Yup I got it. Thank you! 

 Thanks for the help