Found settleing in to roost for the night in almost the exact same spot two nights in a row. The second night there were three other larger bees that kept working till they disappeared (reported separately https://canberra.naturemapr.org/sightings/4483086 )
From the images it is not possible to tell whether this is A. asserta or A. chlorocyanea. The smaller size might be explained by this being a male while the others were females.