Can you customise orders in Australia?

Hi! Sorry if this is a silly question, but i live in the country and plan on taking a vacation to a city for my birthday in January!- because of living remotely, i get starbucks once a year. I live in Australia and i see so many people in the us getting these crazy customised orders and i wasnt sure if Australia does that as well? I’d hate to embarrass myself in the store if we dont :’) i really wanted to get a drink like this but wasn’t sure if its just in the US that you can customise and add on to your orders…