This is pretty much a ban. Why would the company convert their main product into a competitor? Majority of congress isn't stupid and knows what they want to happen.
Thats easy to answer.
The reason why is because they'd get paid 10s of billions of billions of dollars for it, and otherwise their investment would massively lose a large amount of value otherwise.
Also, bytedance wouldn't be competing with tiktok anymore in those markets as they'd have sold it off.
So the choice is either to make a bunch of money, or to instead have their investment become worthless.
The tiktok that you know about is the international app that already doesnt compete with the rest of bytedance.