I haven’t been to Australia, but I’ve run in Hawaii, which is part of Oceania (broader than just Australia).
Or NZ at the least. Hawaii isn't on the content. You've got only one continent to go before you can check that box.
I have 100% confidence you'll do it!
I ran every day for a year, and kinda wished I had kept going (though I only managed 3 continents in that year).