Indonesia is in Asia and the majority of the others are not countries (i. e., Guam and American Samoa, French Polynesia, New Caledonia, the Cook islands).
You didn't have a bad idea in starting this quiz but you need to state that you are including overseas territories of other countries in the quiz and then remove Indonesia and Timor Leste (East Timor) from this quiz because they are traditionally grouped in with Asia.
hutt river is not only a micronation AKA shouldn't be counted as a country, but it was dissolved in 2020 so even disregarding the first thing it shouldn't be counted.