Yes, it’s true.
I had cool (not amazing) snowboard in Brazil. More, in plain summer (or it’s spring yet?).
The slope is located in Sao Roque, SP, about an hour and half from the Capital Sao Paulo. It’s really fun, but I could only find one summit for begginners. The hardest one was closed, unfortunately.
Try to check out this place if you, like me, don’t have snowboarding as a country’s core.