I've never understood this part of it. There's a disinformation problem on all of these platforms, so why not just kill all of them? The only argument I've seen is basically that it's better for the West to be the ones manipulating people in the West vs. having people in the East manipulating people in the West. And that just doesn't feel like a good argument.

As much as there are legitimate reasons to go after TikTok, I can't help but feel it's not a coincidence that it gets singled out for legislation because it's the only one owned by China.

And yes, that ownership is problematic but I would argue that the others including those you've listed here are equally problematic for the safety of users.

So to answer your question: they should be too, but they likely won't, because the force behind this isn't a desire to protect users from disinformation, the desire is to protect western companies from scary Asian competition. Same reason behind us constantly propping up Detroit. Protecting people from disinformation is just an excuse.

TikTok isn’t getting banned. PRC control of TikTok is getting banned. TikTok can survive by selling to a company outside of the US.

You'd have to ask Mark Zuckerberg and Elon Musk about their agenda for America, and for Americans.