português
What is your country or region? Is your inquiry for Brazil, or Portugal, or a different country with Portuguese as main language?
Do you watch this through a subscription streaming provider? Which one?
Or did you purchase this from the iTunes Store? I don’t think TV Shows are sold through Apple in countries where Portuguese is a main language. [US, CA, FR, DE, UK, AU only.]
Subtitles are included when the supplying studio wants that, in the languages that they select. That may not always include English or Portuguese, or maybe none at all [especially for content aimed at children that can’t read as fast as is spoken]. You may choose to contact Cartoon Network/WB about your wishes for distribution with soft subtitles in your country or region.