Thank you so much Wendy and Don. It definitely looks like a Symbolistis sp. probably orophota. I tried very hard to find something that matched but got nowhere.
Again, the distinctive white and dark pattern near the tip of the antennae can apprently help identification:- https://biocache.ala.org.au/occurrences/e39b3476-4f1a-4727-84dc-e4765cc581bc