The terms now say that TikTok users “forever waive” rights to pursue any older claims.

not a lawyer, but i don’t think a company can override a country’s law. If US failed to address this then the constitution is basically useless in the eye of corporation.

IANAL, and I get that this varies by country, but at least some of TikTok’s users are in the UK, where the courts have very thoroughly established that some contract terms are automatically unreasonable and are completely unenforceable even if someone agrees to them (the biggest example actually being most non-compete clauses in employment contracts!) This would seem to be one such case. This contract term is so blatantly unreasonable that I don’t see how a court would uphold it even if the users agreed to it.