My comments are along the lines of "people always want to point to some ancient food and say this is where it started" but in reality, we are impressing a modern definition to something that is nothing like what we know.
Flatbreads with toppings have been around from back before Pompeii. Are they "pizza", maybe in some respects, but not in the strict definition of Neapolitan pizza, or in most definitions.
Same with lots of things, beer in Egypt would not be recognizable (nor would any beer before the 800's), same with wine in Roman times, Scotch before the 1700's, many foods, the hallmarks that we define a food or drink by, just do not apply that far back.