Your link doesn’t even mention EV D-68, much less say it is endemic to Central America.
In fact, of the clusters or outbreaks of this disease that have occurred since it was discovered, none were in Central or Latin America.
Those clusters were in Philippines, Japan, the Netherlands, and the states of Georgia, Pennsylvania, Arizona and California.
See my comment at #43 - that article merely stands for the (unsurprising) proposition that some percentage of kids who present with flu-like symptoms have an enterovirus. Not necessarily EV-D 68 (and in most cases, an EV-A or EV-B virus), but an enterovirus.