Below is an actual side by side comparison of Windows 10 version 1909 (✅ Working Microphone) and Windows 10 version 2004 (❌ Not Working).
In this setup, I have used the same computer, and created a clean install of Windows using the versions stated above.
BOSE should acknowledge this issue and should roll out updates to their drivers to make it compatible to new builds of Windows 10. I don't have to try this on every build to prove a point.
Related Issues:
Same issue with QC35II on the latest Win 10. Only audio works (no microphone) and it glitches a lot.
Cannot install Win 11 because it's a Mac laptop which does not have TPM.
Tried upgrading the firmware on the headphones and looked for the latest drivers.
No solution yet.
I do get some unknown devices when I connect the headphones via bluetooth but cannot find the drivers for them.

P.S. the links to the related issues do not work anymore.