Health ministry seems to confirm it. Calling Fake News on an article without any evidence comes across as needlessly partisan.
> The U.S. government has spoken with many (more than 25) companies that claim they can help with a vaccine. Most of these companies already received seed funding from U.S. investors... any solution found would be shared with the world
https://www.reuters.com/article/us-health-coronavirus-german...
The only official agreement is that “We confirm the report in the WELT am Sonntag,” quote, but it's not clear what exactly they confirmed. From referenced article, it seem to be only “The German government is very interested in ensuring that vaccines and active substances against the new coronavirus are also developed in Germany and Europe.” and “In this regard, the government is in intensive exchange with the company CureVac,”.