From what I can see, it's been decreasing rapidly especially this past year. Hybrid arrangements used to be offered at 1-2 days in the office and now it's down to 1-2 days at home. I've also seen quite an increase 2024 onward of full time at the office. Coincidentally, that's when the AU job market took a hit and layoffs started becoming a weekly occurrence.
As of 2024, 36% of Australians work from home (https://www.ceda.com.au/research-and-policy/research/economy...)