To me this signals that TikTok isn't sharing with the 3-letter agencies and they don't like it.
https://www.reuters.com/world/us/alabama-utah-become-latest-...
It doesn't make sense to cut TikTok from US civilian devices because: Land of the free, free speech etc etc etc.
The other guy you replied to is correct, CIA/NSA et all don't like they can't swing their ducks into Bytedance servers and doctorate the content without exposing intelligence agencies MO to the Chinese.
Every American should be fighting against such bill because when domestic cronies own all domestic media, you guys are in a virtual China. Media plurality is the beacon of a healthy democracy, so suck it up Rubio