What's going on in Australia, you mean the international travel restrictions?
One of the things I see "going on in Australia". Australia has had around 8 covid deaths per 100K population. Compared to, say, the United States with 237 covid deaths per 100K population. I see that and still think it's about a virus, yup.
In general over the past two years as a whole, people in Australia have lived with fewer restrictions or changes to everyday life than here in the US, with an order of magnitude fewer deaths. I still think it's about a virus, yup.
(I do not necessarily endorse international travel restrictions, including the ones the USA is enforcing, which seem to be pretty fruitless, and in some cases stricter than Australia's. I think they are mistaken. But it's about a virus, yup. Among other things, certainly US general xenophobia and anti-immigrant sentiment are involved in ours too. I too worry that we are imposing controls we will never see the end of, including related to border-crossing, which suits the agenda of some just fine. I'm sure it's about more than one thing in Australia too. Human things usually are. But it's about a virus, yup.).