No, both sweet and savory pies predate the Americas, with savory pies common in the medieval period, and sweet pies rare but still made, and only showing up near the end of the period.
A pie is just a baked pastry with filling inside, and so there are probably pre-Columbian dishes which you could classify as a pie, although that starts getting into classification debate a la "is a hot dog a sandwich?"
The Wikipedia page for pie lists a Jamaican patty as a pie, which I guess is technically correct but I'm not sure how I feel about the classification.
Unfortunately, we don't have great records of pre-Columbian food in the Americas. That being said, wrapping a filling in pastry, putting it in a dish, and baking it in an oven is not that hard to independently come up with.
The Columbian exchange has really big impacts on food even on countries that did not participate in colonization of the Americas. Potatoes don't exist in Russian cuisine until then; same for chili peppers in India or Korea.
> Unfortunately, we don't have great records of pre-Columbian food in the Americas
Yeah but that's all irrelevant.
They didn't say pie in Europe predated pie in the Americas. The said the idea of pie predated the Americas... entirely. Like we were eating pies before the existence of the continents of the Americas.
> both sweet and savory pies predate the Americas
Clearly, it didn't. The Americas didn't pop into existence when Europeans reached them. They were there before humans started to cultivate grasses to make pie crusts from.
Hmmm... I think the Americas have existed for as long as any other continent, and been populated for almost as long.