App solution maybe?
I saw a lot of complaints about the app and this is how it worked for me. I just had to manually connect the printer to Bluetooth from my settings on my iPhone, as if I was connecting to a speaker or something. After I did that a prompt came up that the app would like to connect to the speaker and I just clicked allow and it’s been great! I would say download the app first and then do the steps above to try and connect it. Hope this helps someone <3