My bf got the two shot Pfizer vaccine. He tried to get a vaccination passport and the state only thinks he got one shot. And he signed up through the state website for the shots.
Now one can fight the bureaucracy I guess (do we spend way too much of our lives fighting bureaucracies), because as proof there are also the cards one got at vaccination, there is maybe the record from health insurance, maybe (who wants to deal with them either). Or what the hey there is just getting a 3rd shot, though I think J&J makes more sense to mix it up in that case.