> What jurisdiction do they have on an American site ? If it is an American site that only does business in America... well still all the jurisdiction they nee

> What jurisdiction do they have on an American site ? If it is an American site that only does business in America... well still all the jurisdiction they need; that's kind of how sovereignty works. But little practical ability to enforce orders. But X isn't an American site that only does business in America so the issue is moot, anyhow. It's a multinational corporate network with both business dealings and a local corporation in the EU whose corporate parent happens to be HQ’d in the US, and the EU has as much legal and practical jurisdiction over it as the US had over TikTok when its corporate parent was in China.