Sorry Jason, I realise that my reply seemed (and was) unhelpful.

Like you I joined the forum as a new user (of an N800) expecting to find info and help on using/tweaking my IT.

I soon found that, after I'd ask a question (nicely, with 'Please' and 'Thank You'), I'd get cryptic replies pointing me at search boxes and sarcastic 'Newbie' animations. You will discover this if you have a look at some other threads on the forum.

I soon learned to stop asking questions. So when you posted about a subject that has been previously discussed, my spider sense tingled as I imagined all the SMs (Senior Members) circling for the kill. I have learned to recognize a 'tethered goat' newbie when I see one (being one myself). I was just wishing you luck with the answers.

I too have Moto S9s, and the answer to your original question appears to be that you must install some A2DP software on your IT. At present this software seems to be work-in-progress; a bit buggy, slow and power hungry, so I haven't bothered to install it on mine at present.
If you get it working let us know.