I have noticed two separate issues in relation to the audio whilst using the Link to Windows feature.
Firstly, when I link my Samsung S10 to my Windows laptop it works great and I have no issues with it. I have even tested making a call from my laptop and it worked extremely well, however when I connect my Bluetooth headphones to my laptop, the sound reverts back to the phone and doesn't come through the headphones as you would expect. Then whenever I try to make a call from the laptop, the sound comes from the phone instead.
Secondly, any audio or video played from the Windows machine (via link to Windows) plays the audio from the phone too instead of the laptop (or any Bluetooth headphones connected to the laptop). Is this a bug that requires fixing or a feature not yet developed? Or is it something I'm doing wrong?