Hello! I once faced a similar problem as yours and figured out a solution which I’m eager to share with you.
The Problem:
I encountered an issue with my newly purchased 2nd Generation AirPods Pro (hereafter referred to as ‘AirPods’) connecting to the microphone of my Surface Laptop4.
The Situation:
The AirPods functioned well as both input and output devices with my iPhone 13 Pro and iPad, but only worked for output audio on the laptop. Although the AirPods appeared in the Input device list in the Speaker and Microphone settings on my laptop, the test resulted in 0% Total Audio (post-resolution, it returns approximately 80%). My 1st generation AirPods Pro and my brother’s AirPods Pro connected with both valid input and output functionality.
The Solution:
1. I navigated to the Device Manager, then to Audio Inputs and Outputs, and uninstalled all AirPods-related devices/properties.
2. I performed a hard reset on the AirPods, a process that’s straightforward and easily found via a Google search.
3. I reconnected the AirPods to my phone and the laptop.
By following the above steps, I managed to get the microphone of my 2nd Generation AirPods Pro to work on my PC.
I hope you find this information useful. Enjoy your day!