With a 2020 queen not laying she is a problem, two days ago I did a few inspections of my wooden hives and found 3 to 4 frames of brood. With the same climate and about 1C temperature difference I would expect the same in your hive if all was good.
I made a couple of phone calls to people on the Gold Coast last night and they told me their hives were going really well and producing an excess of honey. both said there was good orientation flight numbers of bees. Going on that information it isn’t a climate issue so I’m guessing the queen is a dud.
Cheers