To be even more explicit, Facebook and Google collect info which the US government can and does request from them. See: Transparency Reports from both.
Collecting data and complying with a warrant is not the same thing.
You're right. But every social media and advertising company do both, regardless.
With secret warrants and secret courts, they can be same thing.
Yes.
Exactly. So this whole talk of "let's ban TikTok" is nonsense that won't solve the problem. But America doesn't have the guts to do what must be done to protect the privacy of its citizens (also doesn't want to)