Car is a 2015 Ford Focus.

Noticed the smell recently. It’s my son’s car and has been sitting for a week, so it’s not like a filler thing that only happens when filling up. Tank is recently filled though (a week ago), so it is topped up. I can see a few drips on the ground and a little wetness underneath near the rear of the vehicle (tank area). I’m going to crawl under there today, but I was hoping someone here may have some thoughts where to look. This is Arizona vehicle, so it seems pretty weird to have a fuel leak. My best guess is maybe where the filler meets the tank, if the tank is full up to that point?