Here is oz the vaccine rollout is pretty much in shambles because of the way the federal government keeps hand-balling the actual implementation out to the states and blaming them for delays and screw-up's.
Here it's Pfizer or AZ but I don't think people registering to get the vax get to choose which one. The target was 4 million oz people vax'd by end of March and so far only about 1 million (out of the 25 ish million total population of the country) have accepted a jab.