You're trying to intentionally confuse to tangential concepts, and murdering common sense and logic to do so.
Amtrak is almost entirely owned by the US Government and has taken in 10s of billion of federal dollars to operate, yet you can go out and sue it like any other company despite the protections US Government entities normally have.
Because owning something, and being that thing, are not the same thing... in case you didn't realize. That's actually one of the core justifications of most corporations
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The Chinese government is not suing the US Government, TikTok is. Sure there's lots of fun power dynamics to dive into over who controls TikTok and so on, but if you can't get the simple fact of who's suing who, you should hush up on the topic.