Hi Liz Nyagoha,
Thanks for sharing the details. To narrow this down, could you let me know whether you’re using the built-in Surface microphone or a headset and whether Google Meet is open in Chrome or Edge? Also, does the microphone work in other apps, such as Sound Recorder or another calling app?
If the microphone works elsewhere, please check whether the microphone level moves on the Google Meet preview screen. You can also select the arrow beside the microphone icon and confirm that Microphone Array (Surface) is selected. Then check the site controls beside the browser’s address bar and make sure microphone access is set to Allow.
If the microphone does not work in other apps either, try turning off Audio enhancements under Settings > System > Sound > Input, then open the Surface app > Help & support and install any available driver or firmware updates. These are recommended steps for built-in Surface microphone problems.
Please let me know what happens during the Google Meet preview test and whether the microphone works outside Meet.