Last image shows what I've interpreted to be leaves that are adaxially scabrous or slightly roughened by persistent short septate hairs or bristles as per the Walsh 2014 key in Muelleria 32.
I am inclined to Coronidium sp. Like a lot of Brindy Coronidiums, it has characters to fit a bit of all three - scorpioides, monticola, and gunnianum. Do you have measurements for flower diameter, leaf length, and lesf width?
Capitula 25-30mm dia, larger leaves to around 50mm long and 10-12 mm wide. I went by the rough leaf surface as per the Walsh key, but I concede some of that roughness may have arisen from the western NSW soil deposited on the leaf surface during recent rain. I also note that the ACT plant census seems to have decided to ignore the revision by Walsh.
Here is Neville’s reply. Fortuitously I can actually see the septate bristles on the upper leaf surfaces in one of the photos (image 5/5), so I'd be pretty confident of this being C. scorpioides s.s. It is high for this sp., but it happens, particularly on the Sthn Tablelands of NSW, less commonly in Vic (but in some of those uppity subalpine woodlands that can carry Themeda etc., around 1000-1200 m)