How much can we trust this so-called sovereign cloud? That's a sincere question. I can't think of a more American company than Amazon, and I find it hard to believe that it could be completely independent from its American headquarters.
I really hope that Europe will get its act together rather than relying on this half-hearted solution.
Not at all. Trump applies any leverage he can. "Nice US cloud you've got there... would be a shame if anything happened to it..."
They claim the "AWS European Sovereign Cloud represents a physically and logically separate cloud infrastructure, with all components located entirely within the EU" and that it operates entirely under German laws, but I think your skepticism is warranted.
I think Europe should push for its own solutions rather than fuel oligarchy/authoritarianism, if they are serious about their own security and preserving liberal values.