@Carolyn: If you live in Australia, then your iPhone IOS or laptop OS will be the Australian one—and that is the one that is missing the hearing test and AirPods Pro 2 programming function (this is the reason for the hearing test, to alter the sensitivities of the pods to your hearing profile). And you're probably right about the Apple ID, too. I think we're going to have to wait.
The really irritating thing is that a year ago I was able to program my AirPods Pro 2s with the results of a hearing test, and this really improved them for music and movies. It did nothing for them to be used as hearing assistance devides, though.