If China really is using TikTok for psyops, then they will refused to sell, flood TikTok with anti-government sentiment for its remaining days, and then direct people to just use the TikTok website hosted in China (is our government going to start blocking access to websites too?).
One silver line here is "the youths" will learn, in an unusually clear way, that the government effects their lives and can screw up their lives.
If ByteDance is a normal company they will seek profits and sell for as much as they can.
But if TikTok is a Chinese psyop, they'll just use any of the many legal tricks we allow to change the "owner" while China still retains control. Companies do this all the time, look at shell companies and such. It's super easy for China to mask the true owner if they decide to.
This is why we should make broadly applicable regulations instead of picking on one specific company.