Like, the critical problem with the AWS sovereign pitch is that you must believe that they won’t give the keys to the US, and they also won’t give the source code that’s hosted in the US to the government either for them to find vulnerabilities in. I don’t know if that’s good enough unless you just need the data to stay in the EU and you don’t care if another country sees it.
I know they probably did some work on it (what if primary AWS goes rogue and the EU entity must work without it) but I don’t know if they explained how they’re safe to the public.