Well they look like carriers, kinda. Physiologically they will be our carriers that we can project power from to our region.
Abe is right, they are slow, they have almost no fuel bunkerage other than as a training exercise. So complimentary rather than additional. I do wonder if Australia could get away with just 1 full time carrier. Heck we would struggle to escort anything else anyway.
But look at what the ADF really needs. More patrol boats, more subs, AWD's, maybe some tracked artillery, drones, helicopters, new aircraft, missiles etc. Carrier is way down on a list.