Known. Cremated remains of a woman were found in a dune by dry Lake Mungo.
Lake Mungo is in western New South Wales, on country of the Paakantyi/Barkindji, Ngiyampaa, and Mutthi Mutthi peoples. The remains, known as Mungo Lady, are about 40,000 years old. They are among the oldest known human remains in Australia. Remains of a man of about the same age were found nearby.
The page says many parts of this deep past are still debated, including how people lived alongside the giant animals.
https://www.ancient-origins.net/news-evolution-human-origins/aboriginal-australians-021968