Two questions to anyone....
Did dinosaurs in Australia disappear around 65 mya, like the rest of the world?
Have we found dinosaurs in Antarctica, or is there too much ice to really explore there?
Yes, there were dinosaurs in Antarctica.
It was during/towards the end of the l o n g Cretaceous period that the continents we know finally split apart, and Antarctica moved close to its present position (though still attached to Australia).
There were certainly live dinosaurs in Antarctica (it wasn’t covered in ice at the time).