I'll tell you what is NOT hot! I have Phonak Audeos paired over bluetooth with my iPhone. A few years prior, I used to have Oticon, also paired with my iPhone. With the Oticon, if I made a cellphone call, the iPhone would use the default iPhone microphone while the audio would stream to my hearing aids. It was good that way because in a noisy environment I could hold the iphone right up to my mouth and the other part…
I have the same problem, but I always assumed it was Apple's fault. I don't know why the HAs/Airpods have the final say. I don't think there's a way around it on the iphone, but I was able to cobble a fix for my macbook at least. It uses Shortery to run a Shortcut whenever my HA connects. The Shortcut runs a shell script that uses https://github.com/deweller/switchaudio-osx/ to determine the built-in mic and switch b…
And AirPodsSanity (& SoundAnchor) offer polished options here. Maybe using that same script underneath!