mic not working

Have you tried accessing your Zoom desktop application > Settings > Audio tab and tried changing the mics there?
You can also click Test Mic and follow the steps there:

Hi, I just wanted to check in and see if my response has been of help to you. If so, it will be greatly appreciated if you can click the 'Accept as Solution' button.

This will be a great help to the community and to people who are having the same concern and are looking for answers.