I'm not sure this is the right place to post this but I'm just going to guess that it is.

I recently upgraded my desktop from 7 to 10. I used to connect my laptop (already using 10) to my desktop via Bluetooth and it allowed me to select the desktop pc's speakers as audio output, effectively mixing both computers' audio through my headphones attached to the desktop. This is no longer something my computers seem to do; literally all that has changed is that I upgraded the desktop OS and I would have assumed this is something windows10 can do but the Bluetooth menu is almost comically unhelpful.
It used to be relatively easy to do this in 7 but I am at a loss as to how to do this in 10. Is this functionality somehow not a part of Win10?