There used to be one in Sao Paulo, but I think the organizer stopped paying for the meetup.com subscription. There's still a meetup page for one in Pelotas (https://www.meetup.com/Pelotas-Emacs-Meetup/) which is inactive, but maybe it can be turned into an online meetup? EmacsATX uses Google Meet; I can also set you up on BigBlueButton if you prefer something that uses free/libre software.