Is it? Does Tiktok track everything you do across the entire Internet, like Facebook and Google do? They might, I don't know, but I haven't seen "tiktok.com" in my NoScript list on 90% of websites like I have FB and Google.
The problem with Facebook and Google is that they've got their spyware littered across most websites and third-party apps, so you get stalked even if you do not use FB/Google nor ever read/agreed to their ToS/privacy policy.