While it's true that the accusations were out there, the whole thing was quickly proven wrong. The document in question is accessible [0] (in German, and even hosted at the website of Cicero, which invented the story) and clearly comes to the conclusion that nuclear reactors in Germany should not continue to run. It's even written in bold letters.

[0] https://assets.cicero.de/2024-04/2022-03-03_Atomaufsicht_Ver...

You'll notice that, if you read the original messages, nowhere did they suggest anything concrete. They're just offering to investigate what would need to be done to continue operation. This is just blown out of proportion and thus far has had no relevance in the German political landscape. It's rightfully ignored.

I don't find a single, reliable German source for all of that fuss. That might make you think about it again...