Not European citizens though as they aren’t members of the EU. Many Brits don’t consider themselves Europeans, but that’s beside the point.U might be confused here, there are several european countries that don't belong to EU ( uk, Moldova, Ukraine, Bielorussia, Norway, Switzerland, Serbia ) plus micro states like San Marino, Liechtestein, Andorra, Monaco, although some of those have a special status, on top of my head, google might well bring more.
People from there are considered Europeans afaik.
Stupid Tony originally posted that European citizens getting vaccinated before US citizens - but then went back and changed it because he realized he’s a fucking idiot.