Hearing Aids: making calls

[lord high executioner]

Hi,
anybody outhere with hearing aids who can make calls with their hearing aids as audio output and a working microphone?

If so, could you please state what
- hearing aids
- phone
- OS version
- and if you had to do something else (install an app, add a setting, ...)
?
Thanks!

I recently got myself a OnePlus 9 Pro and after pairing my Starkey HAs the phone outputs all audio to the HAs w/o trouble, even in a call -- but there's no microphone, hence in a call I hear the other party but they cannot hear me.
While the HAs are recognized as such, Accessibilty does not offer a setting for HA compatibilty, nor is there a way to pick the audio input device or at least check/modify the microphone volume.
All info I can find seems outdated or misses the point entirely (using HAs to make a call).

 

[lord high executioner]

To answer my own question: w/ OOS 13.1 sound is routed directly to my hearing aids and one of the phone's built-in microphones picks up my voice (need to experiment further to find out how to hold the phone to get the best quality).

I currently try to figure out if it still works that way if I flash LOS ...