Here's an article which compares meta-narratives in Texas vs. California:
https://www.nytimes.com/interactive/2020/01/12/us/texas-vs-c...
Fights over textbook content are ancient and written about constantly. Since these battles are more heavily scrutinized outright falsehoods won't be found easily — rather meta-narratives are achieved by omission or emphasis.
I would not argue that these meta-narratives are "ahistorical", though — rather, I would say that they reflect the interests of certain parties. Perspective is inseparable from "history".