International charger

Hi there I bought to my mother in an iPhone 11 to my mother in law few days ago at Sydney Apple Store.

The question is my mother in law lives in Brazil she came to visit us and we completely forgot to ask about the Brazilian charger. Because of that she doesn’t even opened the box to enjoy her new mobile phone.

Does it possible to change the charger for Brazilian standard ? Or when she came back to Brazil does it possible to change her charger?

Thanks