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TikTok requires users to “forever waive” rights to sue over past harms
(arstechnica.com)
This is a most excellent place for technology news and articles.
They are usually defining the specifics of whatever contract the company offers to their users, be it the sales or whatever services the company is providing. I don't know which legal system you're living under, but such additional clauses added to the base contract can very much be explicitly or implicitly agreed upon.
Edit: Of course this particular rendition of "We're allowed to break the law - no take-backsies" won't stand anywhere consumers have like any rights at all.