It's only accusation and yet until now they didn't have any proof beside being jealous of what China and Chinese companies achieved while playing dirty by pressuring them.
American social media was banned because they didn't want to follow the law and rules in China. While TikTok followed every regulation to the local law and rules in the US.
Now the US are forcing to sell or blocked every single non-american company whom already complied to all their law and rules, truly the first country in history doing this.
There are literally thousands of apps that do that, but they were targeting TikTok?
This is a political and economical move, if this is how US and Trump wanted it to be, by forcing another company to sell into another local company then it would be a forced acquisition and this would make other companies to reconsidered to invest or build their company in the US.
By this rule, other country in this case China could also enforced banning on services and products into their market with the reason of "Security, Influence and State Control"
Because the reason they focused on Tiktok is that the giant tech in america are unable to beat Tiktok popularity.
I could only see it like that, I'm sure that the reason of this banning if you can see is that Trump and US administration is just like a thug that were hired by some company to hinder/destroy the rising company.