When they want to pressure Australia they just stop buying coal, iron ore and wine
You might want to pay a bit more attention to what is actually happening in the region. China stopped buying Australian wine since before covid. They also stopped buying barley, lobsters, beef and coal. What did Australia do? I will tell you what didn't happen and that was the country fell and to a heap and beg China for forgiveness. Other markets were found because that what happens with global trade. As for the iron ore, China needs it more than the political pressure stopping it would apply. As a matter of fact, with the price of iron ore, Australia is doing quite well out of Chinese trade bans.