I think this is the adult Hibiscus Harlequin bug. (Tectocoris diophthalmus)
This is what Queensland museum says about them.
The Hibiscus Harlequin Bug sucks sap from hibiscus plants, bottle trees and related species. Its main foodplant is the native Beach Hibiscus (Hibiscus tiliaceus). It is also a minor pest of cultivated cotton, a member of the hibiscus family Malvaceae, leading to its other common name, the Cotton Harlequin Bug.
The light has really caught those glitter bits on it. Quite a striking bug even if it is a pest.
Thanks to JDO for hosting TT this month.