Source?

Moderna (another mRNA vaccine) alone is estimating it will produce between 600M and 1B vaccines in 2021 already: https://www.google.com/amp/s/mobile.reuters.com/article/amp/...

Curevac is on track to apply for authorization for another mRNA vaccine in Q2: https://www.biopharma-reporter.com/Article/2021/03/22/CureVa...

It's not out of the question that the EU will be able to supply itself entirely with mRNA (or inactivated virus) past 2021.