That really looks like a standard manufacturing tolerances. When the car was assembled, they had the option to adjust fenders.
Sadly, it will never be perfect, in spite of all things going on today... I'd let it go. First world problem.
Only go with factory warranty. But I would question why you think you need one. These cars are almost flawless.
In 30 years of buying cars, I never bought one, nor did I ever need one. Saved enough to probably buy a car or two.