I don't think it is O. opogona as it is one I was quite familiar with in Qld and this one is much smaller, this has a fluffy head and other features are different too.
I think it looks even more like Parochmastis styracodes on LBH, particularly the spot in the fringes of the forewing by the tornus, although again the forewing dark markings are less evident than in the LBH photos.
Hmm. Hard to sure. But there is not much evidence of the three black diagonal bands across the forewing which is a feature of several exmples of P. styracodes on iNaturalist.