How to troubleshoot a C7 Audi A6 that won't start?

I have a 2016 Audi A6 C7 which won't start. I have checked the battery and it seems fine. What could be the possible reasons for this issue and how can I troubleshoot it?

First, check if the fuel pump is working by listening for a humming sound when you turn the key to the on position. If the pump is not working, you may need to replace it. Also, check for any disconnected or damaged wiring around the fuel pump.