Hello OverAardvark215,
Thanks for posting your concern here. We're sorry to learn that you're having an issue with the microphone on Windows.
First, we need to ensure that your Surface Headphones 2 are updated. Update your headphones here. Please try to check if the microphone was set up correctly. See How to set up and test microphones in Windows 10 for more details. Also, check if the host device enabled the privacy for microphone and other connected device. See Windows 10 camera, microphone, and privacy to find out how. Once finished set up, test the microphone again.
After performing the above mentioned, if the issue still persists even to several host devices, then it's potentially related to a hardware failure on the headphones. For any hardware concern, kindly contact Microsoft Surface Support to seek options for your headphones. If you're located outside United States, see Global Support.
If this answers your question, please let our Community know by marking this post as an answer. Otherwise, don't hesitate to respond to this thread if there’s anything else that needs to be addressed.
Regards,
StevenK