I think there are detailed markings suggesting this moth is Ectropis bhurmitra (eg. thorax and abdoment markings including 'double' spets etc.), see https://www.inaturalist.org/observations?subview=map&taxon_id=124225&view=species The moth lacks two features which would clearly identify it as E. excursaria: 1. a major kink in a prominent forewing mainline, and 2. a clear 'step' in an outer hindwing main line. There are NSW records of this species, as far south ar Mt Kembla. NSW.