I think the faint forewing pattern matches S. cervalis. Also the distinctly barred/striped antennae. iNaturalist's AI search suggests Crambidae but on these images doesnt suggest A cervalis. See here;- https://www.inaturalist.org/taxa/892193-Sedenia-cervalis. A new species for NatureMapr's Canberra and Southern Tablelands regipn when confirmed.