Pix in only for brazil, not LATAM.
"Mercado Pago" doesn't work across the entire LATAM region either; it only works in 8 countries, while LATAMcomprises 20 or 33 countries (depending on whether you include Caribbean countries that don't have Latin roots in their languages). So, it wouldn't be a valid option for all of LATAM either.
Look, I understand you're offering alternatives, and there's nothing wrong with that. What I'm trying to point out is that the alternatives you offer should be based on accurate, not erroneous, information. For example, if the admin added Pix thinking it would be an alternative for the entire Latin American region, they would later realize it only works in one country, and that would be the problem: the expectation versus reality.