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Not for the data of US citizens, no?

I’d imagine (but don’t know) that they do for the citizens of those countries, but wouldn’t, for example, give your list of Facebook groups to the Indian government if asked. The later sounds like a major incident for FB to me but if TikTok was asked by the Chinese government we might not even know.

How does FB know if someone's an American citizen? I wasn't asked my citizenship when I opened my account.

You could be a foreign student living in America for years without becoming a citizen.

I’d suppose the onus of proving citizenship would be on the party requesting the information, to prove they have a legal right to it in their country? But I really don’t know.

I doubt they comply with any requests from the few countries they have no presence in.

They comply, their compliance just involves a whole lot of blacked out text.