I'm a 1B - and in the "AZ danger zone" - had my 2nd AZ on Saturday, the 3 month mark from my 1st AZ. It will be interesting to see how many 1B'ers don't go ahead with the 2nd AZ because they are now scared of AZ and/or now within the Pfizer age range.Well at the moment the majority of those eligible for second AZ are over 70, as 1B only started in late March. This cohort dont have another vaccine option so not likely to see much of a drop-off.
However, as we get into mid July and second doses start to include the over 50s (who started AZ process later) you will see the real numbers refusing a second dose start to be reflected.
My fully vaccinated status now appears in the medicare records on the MY GOV website and I was able to download what they call a "COVID digital certificate" which I was overly excited to see.