I have done this too, partially. The problem with bluetooth on windows is that it doesn't work in duplex mode. You can't use speaker and mic together on bluetooth. If you disable the module for mic(don't remember what it's called) then the speaker function works perfectly.

All the support posts that I read told me that bluetooth is the problem, not windows. But I call BS on that as the bluetooth duplexing works perfectly fine on Linux as well as macos.