Our PM, SM has said Aust borders will not be (*widely*) open for a long while to go.
So, international airlines might still not be too keen to fly too much into Aust, unlike prior to Covid, and maybe only carry freight, or only carry freight one way in, and then pax out.
Except the Au - NZ travel bubble, people who want to come to Aust, need to either be Aust citizens, and then quaro, or Aust PR visa holders, or their close relatives.
QR used to fly daily into ADL, now not so often, EK has even stopped flying into ADL.
Any of those flights that do come into from Europe/other countries into Aust, whether they be EK or QR or other airline, might be one of them Covid evacuation flights, with seats costing a lot of $.