Elias here with Shopify Support. Thank you for reaching out!
I understand having Shopify Payments available in Brazil will be a great solution for many businesses. It will definitely be an amazing opportunity for Shopify and many of our merchants, like yourself. Though we aren't able to provide any timelines, we are always looking to grow our services and make Shopify Payments more widely available. With that being said, I'd be happy to share your feedback as a feature request with our teams.
If you have any other questions on Shopify Payments, don't hesitate to let me know in this thread!