I popped up to the Glenfield Mall for lunch and had a look around for any QR codes. I honestly didn't expect to see many, based on others experiences and the fact that retailers don't actually have to offer them.
I found that McDonalds in the food court had one, but not the government one. Instead it took you to some website to enter your contact details.
The only other one I could find was EB Games, and they were using the government one. Unfortunately it wouldn't scan for me in the govt app, tried for about a minute, however it did scan in just seconds using Google Lens. I took a photo:
After coming home I tried to scan it again using the govt app (displaying it on my PC's screen) and after a little while it did eventually scan.