I would really like to see a module for Brazil, because the only one that existed is no longer working and we do not have modules for our country.
Here we have two different payment methods:
Pix - Virtual money for payments, without bills or coins. Uses a QR-code.
Bank slip - Is a collection document that serves as a payment commitment between a customer and a company.
https://dev.efipay.com.br/en/docs/modulos/WHMCS/