These images show one of the parasitic wasps covered under previous sighting 4634548. This wasp was probing one of the large egg sacs. It was the wasp located on its own at middle right of the second image of sighting 4634548.
Possibly Encyrtidae. The genus Fulgoridicida attack eggs of Eurybrachidae (Naumann, I.D. 1991. Hymenoptera, Chapter 42 in 'Insects of Australia', 2nd ed.)
Thanks Kim, I can’t find a good image of Fulgoridicida, I based my tenuous suggestion on this ALA record, https://biocache.ala.org.au/occurrences/4a4e0993-793a-42eb-affd-ade0cabb188c