Actually I was able to work around this weirdness by forgetting the hearing aids from both iPhone bluetooth settings and the Phonak app. I then turned the hearing aids off and back on and paired them via the iPhone Bluetooth settings. I was then able to stream audio and phone calls. I also now have the R-Phonak hearing aid (the main one used to connect via bluetooth) and if I tap it I get the advanced options that allow me to specify device type.
I then tried to pair in the phonak app so that I can control the audio profile and volume from the app. I turned the hearing aids off and back on again. I then selected to pair them both in the phonak app. The app failed on the left one but succeeded with the right one. I tapped to try again and neither were found in the phonak app. I turned them off and back on again and tried pairing in the app again and now all is good.
I think the thing that did it for me was to unpair/forget the hearing aids in iPhone Bluetooth and in the Phonak app and then pair them first via iPhone Bluetooth, then in the Phonak app.
I also think the important thing is to get the main "R-Phonak hearing aid" connected and that did not show up before. The LE_L-Phonak and LE_R-Phonak now show as well as the "R-Phonak hearing aid". I remember my audiologist telling me that one of the two has to be set as the main hearing aid for bluetooth and I guess mine shows up as "R-Phonak hearing aid".
I hope this helps!
-Mikey