I.m not sure I can see the typical Philobota base patttern, and I have not found a match there:- I postulate its a well-marked example:- https://biocache.ala.org.au/occurrences/cb452066-5827-4e4b-8571-4c1220ea5447 Oenochroa (genus) was suggested by iNaturalist's default AI
There are several quite similar Oenochroa (genus) species, but yes I agree that Oenochroa lactella is probably a better fit, based for example, on this record:- https://biocache.ala.org.au/occurrences/95e66b44-7713-47d5-93a7-90fc734e4c9f