The Home Affairs website has a specific page of information for those affected by the Ukrainian crisis
https://www.homeaffairs.gov.au/help-and-support/ukraine-visa-support
The Department is supporting Australia’s response to the escalating crisis in Ukraine and is progressing outstanding visa applications from Ukrainian nationals as a priority, across all visa categories.
See the full announcement here;
https://www.pm.gov.au/media/australias-response-russias-aggression-against-ukraine