And how do you know that Australian courts don't have "jurisdiction" over American corporations which do business in Australia?

Because two weeks ago I was sitting next to Barristers acting for Meta Inc and Google who were both instructed by the US corps. In fact neither even tried to resist the Australian court's authority.

And yes, Australian courts can and have heard cases from world wide plaintiffs for infringements of Australian law.

I spend my time building but I also help with this case. Before Jack became a btc fan he did enormous damage.