I found this on the outside near the flow caps and there is evidence of more. I have oil in my tray and there is a plentiful supply of hive beetles carcasses and casings.
Hiya Jacqui, welcome to the forum.
Keep the colony strong.
I live out west 50km from Coonabarabran. We don’t have cockroaches in the house. Maybe too dry. Have never seen one in horse feed or dog food. If it is a cockroach does it hurt the bees?
Australian native cockroaches tend to stay outdoors by relative comparison to their German counterparts that tend to frequent indoors. Just because you haven’t seen them indoors doesn’t mean they aren’t around your house somewhere…
Keep your hive strong and you should be fine.
We get those in unused hives by the thousands. The chickens love them!