I never heard of a corporation being forced to point out explicitly which lines in their long terms and conditions document have changed. But it's a well known obligation for regular citizens, because material terms.
> that the modifications are actually disclosed to the counterparty before they sign
Does Microsoft explicitly draw your attention to the fact that Copilot is for entertainment purposes? No, it buries that in a long document hoping you won't see it, and advertises it as the complete opposite, but it's ok when they do it, because those are not material terms, whatever that means. It means it's ok when the big guys do it, in the end.