I don't see it in the law. [0]
If you mean section 2.1.a.2.a, it just allows the president to add additional apps to the ban list, not to lift TikTok, which is "hardcoded" into the law.
[0] https://www.congress.gov/bill/118th-congress/house-bill/7521...
> The Act exempts a foreign adversary controlled applica- tion from the prohibitions if the application undergoes a “qualified divestiture.” §2(c)(1). A “qualified divestiture” is one that the President determines will result in the appli- cation “no longer being controlled by a foreign adversary.” §2(g)(6)(A).