I took a chance in whacking the hornets nest with a stick and download the 13.1 version today. I have a iPhone 7, KS8 Hearing Aids, and use the Connexx Smart Direct app. Everything seems to be fine.
The phone works and rings direct to my aids. I get a message alert direct to my aids, which I did not used to get. I don’t use my phone for e-mail, so can’t comment on that. I do not get a lot of messages, so this is all fine for my use.
The MFi triple touch on the home button works. The Live Listen works but does not seem to be real sensitive.
Hope that helps those considering a download… I can’t see any reason not to do it. However, I am not a power user of the iPhone.