Why not? 40% migrant, of direct or 2nd generation <other culture> and so massive amounts of cross-spread into different world experience and outlook. It's a giant melting pot (and not only because if you leave the pot outside, it melts)

for that particular statistic to be relevant you would have to cross correlate against recent immigrants to australia and whether or not working from home is relevant to their places of employment , then you'd have to start factoring in a culture where laziness is valorized (in stark contrast to the work to death ethic presenting in say japan or america) , and at some point it should probably considered that australia has a world class social safety net ... on a personal basis it does seem likely that a similar outcome would occur globally , because the outcome was literally nothing ("no notable change among people who were not already dealing with mental health concerns") ... just trying to make the point that social science is extremely blind to confounding variables

Curious what parts of the average Australian WFH experience would not be able to be generalised to say the US or European worker (in a similar WFH compatible role?).

The only thing I can think of is our poor (by international standards) home internet speeds.