[nantes]

That's an excellent point.

On the other hand, I don't think most people consider a public IP address to be private or protected information. If you're interested in finding the "root" content URL, which lives on a TikTok domain, then you've already implicitly signaled that you accept them knowing your public IP address.

[Aachen]

Of course nobody could consider an IP address private information, similar to how a license plate can be read by everyone wherever you go.

But that doesn't mean it's not protected by privacy legislation. Your plate or IP isn't secret, but tracking everywhere it goes still impacts privacy.