>>96724251 (OP)
Latin america is in a weird place for that, because when it formed into states it was too to have cool stuff with myths and the like, and before the conquistadors there were a lot of too different cultures than barely had anythign to do with others. So you either make it during/after teh conquista or a weird mix with natives and spaniards and proto latam countries, or ou make a 19th century level tech stuff like Castle of falkstein, but even less appealing.
In my setting I did something like that, because its a magical mediterranean kind of setting (Massive medieterranean, the kind where odysseus could actually get lost for 12 years full of cool islands, monsters and cultures) adding all the cool fantastical islands like Atlantis, Hi brasil, Lyoness, Ys etc, and the altantian are e mix of Toltecs/minoan/tartesian/Assyrian/Vinca/Greece/Puma punku stuff, like a Precursos race, so there is a conection with not-europe, atlantics and the americas (wich aren't all conected/are a broken and its like a very big caribean archipielago) and you had a kind of early euro-conquest iron age level than got cut from not-europe for a few centuries and developed they own stuff (not vikings, Iberians, Celts, Polacs etc) aping all kinds of alt histories.