Glad to be of help 
I’ll tag you in my topic when I compose the update, so we can discuss more there about things concerning my situation.
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@Cologne and I believe @Alvin would be interested to see this as well
So, I’ve tried various combinations to see what and how it works for calls for myself.
Phone samsung s8. Skype call echo assistant.
When I have BT shared to two audio, even if call isn’t audio BT call for me through marvels directly quality is pathetic, plus hard to understand. Mic side also sounds bad.
When I switch to single BT output in phone settings it gets a bit better but still nothing to rave about, mic sound a bit better (mind you I hear it through my bad ear at that point)
Then I tried my contraption/adapter, to split and test mic part as well. Now in game enters roger select iN. He on the one side, my headphones with mic on the other side (mostly for mic part)
Again, same caller, but now I could hear both her and my recording pretty well, loud and clearly.
Also, I checked both for youtube video streaming. Again, roger select iN + my adapter or directly with his cable, were clearer/better sound compared to BT.
Then I tried TV connector in place of select, still with my adapter. Did both call and youtube test (on the same video all the time), and guess what? Quality is on par with select used in a same way.
So, I’d suggest that @Cologne thinks about solution of buying phone output splitter to mic + audio, plugin TV connector into audio part, plug some wired mic into mic part. Yes TV connector wants external power, but I successfully made it work using battery pack (which I use to charge phone on the go).
For just listening, no need for adapter.
Total cost? Around 200 eur if you want new TV connector, one splitter that what, 5 eur with postage? battery pack, let’s be generous with 20 eur, and one mic (or some headphones with mic, works also) (so zero if you don’t have to buy it).
If you already have phonak TV connector, give it a try. It comes with male male audio cable which you can plugin into phone directly. Adapter/splitter is needed only for additional mic so for calls, but sound quality for your side even for skype call you can test without mic.
I know it’s wired solution, but maybe when your wife is planning to hear with someone and is at home, it could work 
Edit: oh, few things. Bt call is different program in target than media bt stream than roger program. I had them as close to my autosense calm program as possible
By default phonak plays smart and automatically adjusts streaming programs based on calm + whatnot, end results were horrible to me, after my adjustment it’s decent, but I couldn’t literally clone the curves from calm, so I tried bringing them into the same range for all streaming programs and copy between them.
So I’d say the difference between BT and roger and tv connector in target lines are negligible, which I confirmed by having same listening experience between the two. However I didn’t pay attention in fine tuning other than curves, so some settings could be a bit different (like level of noise cancelling, amount of HA mics in the mix etc).
However, bt directly to HA was always poorer perfomer.
Current setup is fixed bandwidth for bt.
@Blacky Thanks a lot, we already have bought the TV Adapter. Currently I’m away from home for hiking, I’ll be back in a week and give it a try.
Results will be posted.
I’ve been told that Phonak still has no fix or workaround.
I suspect it’s actually the fault of Android (maybe Apple too). Android has never allowed control of bluetooth audio input/output like Windows, for security reasons or something.
I may have found a pretty good solution:
Many of those adapters have built-in microphones. Presumably, you could pair the adapter with Phonak aids, and then plug it into phone’s audio out (could use long cable and clip the adapter on shirt for hands free).
I would think that finding noise canceling headphones with the right size of cups over ears, would give way better bass, isolation and microphone (boom near mouth) with hearing aids than hearing aids ever could alone.
Thanks for the tip! That may come in very handy (because of the limitations built into phone OS). However, it’s just unrealistic to expect mics behind your ears to actually do a good job of picking up what’s coming out of your mouth. Excess noise makes this obvious. +19093900003 is a test service that will echo your audio back