I found a similar Many-plumed Moth on ALA here: https://biocache.ala.org.au/occurrences/b246126b-d764-402e-9004-fc8fc84a8de4, could it be Alucita pygmaea?
Looking again, this is more likely to be a small A. phricodes. A. pygmaea is a truly tiny, much more northern moth (See Moths of Australia) and looks different (see Inat).
A. pygmaea seems to have larger lengths of brown than white on each plume, like this specimen, whereas A. phricodes has vaguely equal lengths of brown and white on each plume. There are several unnamed Australian species on BOLD. I think this is another one.