Closest match I've been able to find is Diaphanta chryseres (Heleiosteres). This named species appears on iNaturalist (4 observations from Victoria and NSW) and amongst Diaphata (genus) on the ALA. The genus Diaphanta appears on the AFD but not this species. See David Aker's record here from near Melbourne. https://biocache.ala.org.au/occurrences/7b9fd186-b32d-411f-b205-5aca1a8925ec I've looked at Catadoceta genus, it is similar, but didn't find a close match.
The ALA shows records for this species from southern Victoria and new Soith Wales. BOLD 4 show records from NSW. I see no records online for Queensland.