"Tropical Americas" covers Northern, Central, and South America. They're all "Americas."
Note that the phrase does not contain "rain forest" nor "jungle."
"Tropical" means "between the latitudes of the Tropic of Cancer and the Tropic of Capricorn.
In the "Tropical Zone" you can have rain forests and you can have deserts (e.g., the Sahara). Some area have a wet season, and a dry season.
Here are Tropical rain forests from all the way from the Equator to the Tropic of Cancer....
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Coco takes place in Santa Cecilia and looks like this....
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Note the forests in the background. It was based on this town...
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I'm sure the animators peeled back a lot of the trees so we can see the town and architecture.
I think the confusion comes from Disney constantly theming DAK to a tropical rain forest/jungle most places.
Coco is in Tropical Americas. That doesn't mean "rain forest."
In fact, Encanto doesn't seem to be in a place that qualifies as "rain forest" either.