Is Taskmaster Australia racist towards Aboriginal Australians?

Until Series 5 with Anisa Nandaula, Taskmaster Australia has only had comedians of Asian descent for racial diversity. Is this a conscious choice or typical of Australian broadcasting? I've googled and there are obviously Aboriginal Australian comedians and comedy shows as well as actors and presenters but to date none have appeared on the show.

Taskmaster New Zealand does not seem to have this issue so I have to question the Australian casting choices.

TIA