Those aren't even newspapers. You won't find the Guardian or the ABC on the news stand next to the Australian, the Herald Sun, and The Age.The Labour party can generally rely on the ABC (our taxes at work)
The Guardian is generally anti-coalition if not necessarily pro-labour.
What is your complaint? Those newspapers do not have to be purchased nor subscribed to.
Firstly, the ABC gives equal airtime to both parties. If you want to make the claim that Labor "can generally rely on the ABC" then are also saying the same about the LNP. They're the most impartial news outlet in the country.
Secondly, the Guardian is certainly left wing and harshly critical of the LNP government. But they're one news agency, and they are only online. You won't see a Guardian newspaper in anyone's newsrooms, you won't hear AM talkback radio hosts discussing the headlines on Guardian's headline.
Thirdly...wait, there is no thirdly. If your list of left wing newspapers is only two items long, and neither of them is even a newspaper, then you've just demonstrated the dominance of right wing media in Australia.
"Labour"? Seriously? The party name uses the American spelling, get over it.The Labour party