Registration cost is quite high in Australia as I understand it, my small 4 cylinder car is around €500 a year, and it's about double for an 8 cylinder.

There is a tax on luxury vehicles over approx €50k, and a fuel tax of about 30 percent per litre , and fuel at about €1.75/l, there's plenty of revenue coming in for the government.

And while Australia is friends with the USA, putting tariffs on Chinese vehicles "to make them happy" would be quite disadvantageous. A lot of Australian raw materials go to China to be turned into stuff that is then sent back. Retaliatory tariffs from China would be quite devastating on those primary industries.

Having said all that, employee leasing arrangements where your employer folds in a car as part of your salary package have been exempt from "fringe benefits tax" if you buy an EV. That works out to around €5000 a year if you are in the upper income tax brackets, so that has had quite an effect on the market.

And to be honest, BYD make EVs that are relatively well built, have good range in the typical Australian climate, have lots of "luxury" items, and are cheap compared to EVs of similar spec from other overseas companies. So if by those means they bring on the wholesale electrification of Australian vehicles, I say go for it.