Okay, my opinion:
Economically, in general, don't see extreme left practice in Australia. Though the ideology does exist in the Greens. Thankfully, they don't have the cards on the table.
In social policy we... and the West in general... Have gone a long way down that road:
Postmodernism
Critical theory
Critical race theory
Gender ideology
DEI
Economic equity
Open borders/ cultural relativism
Replacement theory
Anti white propaganda
etc etc etc
In the establishment of the above, there is a strong movement to implement Marxist economic theory, via this back door.