ELI5: Why is TikTok a threat to national security?

I want to just make it clear that I’m American, and I love this country. I think it’s a wonderful place to live. I’m just trying to look at this from an objective perspective here.<br><br>So what exactly does TikTok do that threatens our security? Why is it a bad thing that it’s Chinese? I just don’t get it<br><br>Edit: I want to say thank you all for the information. I really appreciate the detailed responses that I have gotten from you guys. And thank you all for being patient with me. I will say I did not expect this to get as many responses as it did. Thank you all again. I really appreciate it.