Mine did that after a long trip as well. Never had an issue after the next drive but you can smell the gas stronger near the emissions tubes (not sure the technical term).Yeah can’t get into dealer for 2 weeks. Irritating!
Good luck getting any real assistance from Ford with the fuel in the oil. It a common issue many of us have to one degree or another and has been discussed many times in several threads. If he hasn’t already disposed of the oil send a sample to Blackstone labs for testing to determine the fuel percentage. Mine was 3% which is low compared to others. My 2019 is a short trip very low mileage truck at 7300 miles (retired& Covid). My solution is I’m changing the oil every 3000 and using full synthetic.Well the husband just changed oil and it reaks of gas and probably faulty injector ( gas mileage was a few mpg lower than before on trip) so have to see what dealer says since under warranty.