It doesn't look like Scoliocheta ergatis I have seen where the brown line goes across the eye and slopes backwards rather than a ring right aroundand there is usally a little blotching and a couple of dark dots on the wing. https://lepidoptera.butterflyhouse.com.au/bare/ergatis.html Not recorded this far south in any iNat observations.
I am not convinced with Isomoralla gephyrota ID. On BOLD (incl. spelling mistake) and iNat 'Research Grade" the whitte patch on the head does not extend as far down the thorax as in above. iNat has quite a few unverified examples of this. I think it is another genus/species which I am yet to find.
Looks plausible. Well spotted WendyEM. If the identification is correct records of this species on iNaturalist and the Atlas of Living Australia are predominantly from northeastern NSW, so this record may be a significant extension of known range to the south to the ACT. A first record of this species on natureMapre and for Canberra and the Southern Tablelands. Excellent photos.