If you can not find any audio device on your system that means there is no audio driver installed in your system or something is wrong there.
First download the audio driver for your system compatible then try to install it.
If it works you do not need to troubleshooting for it .
if you’re facing problem like we have showed in the picture you need to check something that will work later
First go to the search and type service.msc then press enter
You must be seeing the audio service is stopped for it . you need to start it and restart your system .
Click Okay Now It’s working.