The first photo shows some lerps and what I assume is a psylid nymph. Psylid nymphs except for the first stage crawlers should not normally be seen but I read that sometimes they move to a different location to feed, which would make sense since the leaf seems to be quite badly damaged. Other photos show what appear to be newly emerged adults on the same red gum sapling. I assume the orange ones (about 2mm long) are female and the tiny black ones (about 0.5mm) male, but this is just a guess they could be something completely different. There were masses of lerps on this sapling and most still had nymphs in them when the photos were taken
Very young Australian Cockroach nymph getting between the outer bracts of the unopened flower head. Ants do the same thing so there must be some food down there, although I don't know why there would be.