USA bought vaccines from everyone a year ago and opened the check book, giving them billions without knowing if the vaccine will work. And then put all their weight to help them find factories and stuff. So USA gambled relatively nothing (Covid has cost many trillions) and gained a lot.
EU doing what they do best...meetings. USA bans exports in this sense: if Pfizer agreed to give USA 50 million shots in March, no exports until that number is delivered. Seems fair.