A dark Ericeia sobria? The outer margins of the forewings and their fine markings would appear to match. Note: Ericeia genus was suggested by iNaturalist's AI feature,
A new species for NatureMapr's Southern Highlands if confirmed. There is a museum record of this species from the southern highlands of Victoria at Corryong, see here:- https://biocache.ala.org.au/occurrences/7ffb9c1b-e1c0-4e32-b466-8e7aec4f4cce