I haven't found any details of production or sale amounts let...

I haven't found any details of production or sale amounts let alone distribution . Hard to say much without data. Have they commented on trial results or progress?

Also very hard to distinguish in real world if a particular product is working unless you have a control, suitable studies and wide data.

UK went for wide data via RAT and has a good picture as people in UK honestly report positives or negatives and " do it for the country " so UK has a pretty clear picture of disease in the country distribution . Australia seems to be in a transition from PCR to hybrid PCR / RAT reporting and typical Aussie complacency will probably give poor number reliability but still have PCR from hospital etc.