Difference in coffee?

I live in America and have an Australian friend who has told me about how garbage American coffee is compared to Australian coffee. She’s lived here for years and said the best coffee she’s had here is worse than the worst she’s had in Australia.

We’ll be in Sydney in April, and Brisbane shortly after.

What’s the big difference in flavor? We typically drink our coffee very sweet, any recommendations about what to order? Any specific places you reccomend as a “must try?”

Edit to add: I’m from Washington state, my Australian friend is in California. I travel all over the US for work though, and drink some form of “coffee,” every day.

I realize I was vague with “coffee,” - I usually drink espresso based drinks. Mostly lattes or mochas which is where the sweetness comes from. I also avoid Starbucks/Dunkin at all costs- I almost always go to local cafes or drive through coffee joints everywhere I go.

Thank you for all the helpful advice and recommendations!!