Considering it's Australia, the government, since it has universal healthcare. So I bet, no, I know for a fact, they are likely getting treated just fine.
Look, I'm getting tired of the whole "but what about the victim" rhetoric, as cold heart as I am, I do have sympathy for the victims but there's a reason they are not the judge, jury, and executioner. They are not involved in this situation, they got justice, their opinion is irrelevant to how the prisoner is treated.
The prisoner was found guilty, she is serving her sentence as agreed by the law. They have forfeit their rights to freedom and are now placed under the care of the state. In the United States, the government must care for the prisoners as commanded by the constitution, that includes insuring they remain alive and healthy. To deny a necessary treatment for a medical condition is to break the law as it's considered cruel and unusual punishment. In California, SRS and transgender health is considered necessary, as the Supreme Courts decided back in 2001. You cannot deny her of that treatment.