Meritastis (genus) was suggested by iNaturalist;s AI algorithm. Seems to match Meritastis umbrosa, see here:- https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/af72859d-2a7a-4973-9fe5-7d7a8bcc34fe#gallery
Would appear to be a sexually dimorphic species, see Moths On-line (CSIRO). If so. this sighting would appear to be the male. https://moths.csiro.au/species_taxonomy/meritastis-umbrosa/