I used to do Frogwatch but needed help from @AnkeMaria on some species. This spot does not usually have much free water, if any, so was a bit surprised to hear so many frogs.
well done! this is the Peron's tree frog- the only frog in the ACT and region that has large toepads and is a climber- all other of our local urban frogs are ground dwelling. This species has a pupil that appears cross shaped. It is one of the most colourchanging frogs in Australia and can be anything from almost white to seemingly dark brown/black. My favourite!!
Not much to go on here but even if a juvenile cunninghami it is not likely to have those stripes of the forelimbs. The reddish dorsal blotches are also pushing me towards a juvenile Tiliqua nigrolutea. To be honest, I'm not sure what it is. Happy to solicit other comments before taking it further.