Australia, at least, has a more-than-ample supply of A-Z BUT many, many people have been ,or still are, reluctant to have it.
It has all been very badly handled indeed.
It also certainly has the ability and resources to set up probably one of the most effective and equitable mass vaccination campaigns in the world - but seems not to have the will to do so.
I have friends there, from when I lived there, who have had A-Z and are/were more than happy to have A-Z but they tell me that because of the (earlier) success with border closures - and what they described as blatant scaremongering in the media - there has never been any real 'impetus' felt for, or applied to, a co-ordinated national vaccination campaign such as we and - eventually - most of the other 'western' nations enjoyed, even those which had a slow start such as Canada.
My friends and former colleagues from some of those communities have ensured their own parents and extended families get vaccinated - but without some overarching organisation, mass national vaccination as we saw it here is simply impossible.
Delta has really, badly, caught then on the wrong foot and there aren't yet (or weren't until very recently) even multi-lingual vaccination leaflets in the areas most in need of them, never mind priests, imams and other multi-cultural community leaders being actively encouraged and given information to talk to their congregations etc about vaccination. One of my friends - a radiologist - said it feels as if the national and federal governments are acting like roos or rabbits 'frozen in the headlights'.