Hello FARAH_abil,
Thanks for posting your concern here.
To troubleshoot your device, please be guided with these steps below:
1. Run Audio Troubleshooter. Go to Settings > Update & Security > Troubleshooter > Recording Audio > Run Troubleshooter.
2. **Run Surface Diagnostic Toolkit and check for Windows Update.**Restart the Surface after installing updates. Updates have fixes to common problems, or issues. 3. Update drivers and firmware
Check what is the current OS Build of your Windows version by typing winveron the search barnear the Windows logo.
Go to **Download driver and firmware for Surface,**choose (your Surface model) then click Download.
Choose the .msi file that matches your current OS Build and click Next.
After downloading, run and install the .msi then Restart.
4. Run System File Checker in Windows 10.
5. **Allow access to the microphone.**See Turn on app permissions for your microphone in Windows 10.
Hope this helps.
Kind regards,
StevenK