How do you know? Presumably you must be able to point to some government transparency documentation about that activity?
Oh wait, nothing like that exists. You don't know what happened. And that's the problem. Neither Musk nor Trump are the CEO of the US. Their behavior should not be considered acceptable by any US citizen.
Please don't sealion. There's no evidence for it occurring in the first place.
It's entirely an internet meme based on extremist headlines. What happened is they set up servers inside government offices that allowed more flexible agile software development environment, then they suddenly got accused of exfiltrating data.