Xperia 1V not passing sound to hearing aids

[TheCustomer]

I'm struggling to get Xperia 1V to pass call audio and stream music to my hearing aids
(Oticon mini rite)

The phone can do this - I've had it working after a series of pairing/unpairing/repairing. But I can't say what I did to get it working other than turn it on & off several times.
I then lost the ability when I'd connected by USB-C to a different sound output, my car, which was recognised as a headset.
The phone didn't revert to the previous working audio streaming setup after I disconnected from the car.

But it still detects and automatically connects to my hearing aids, and defaults calls to Bluetooth, which I then can't hear.
I've just switched from a Google Pixel, where the sound worked faultlessly, so stock Android 14 doesn't have these issues.

Any ideas on how to fix this?

What can I do to set 

[TheGOAT]

@hehduda What did they advise you when you contacted them? Did they offer any troubleshooting steps or to send it to repair or what?

[hehduda]

I have not contacted Sony.
I received my hearing aids at the end of March/beginning of April and tried to isolate the problem; Settings of the hearing aids, the devices themselves or the phone.
When I found this thread and read @TheCustomer 's report about his contact with Sony Support, I found it pointless to contact Sony.

Note: There was a mistake in my second post: of course I meant the manual for the Xperia 1V.

[TheRealOG]

@hehduda I understand your point of view, but I'll have to disagree that contacting the Support line will not help! If they couldn't help, they will be directing you to the place that will. You'll also need to confirm the compatibility of the devices. 

Plus, it's a no harm action if they managed to fix the issue, you have joy.