No, the U.S. won't ban TikTok. The platform offers both sides too much reach that they won't be willing to give up.

As of this writing the current official Biden/Harris campaign account (it used to be @bidenhq then switched to @kamalahq when they traded places) has more than 5.6 million followers on TikTok: https://www.tiktok.com/@kamalahq

Trump has nearly 15 million followers: https://www.tiktok.com/@realdonaldtrump

And this is despite TikTok being "banned" on all government devices.

They're not just going to throw away all those followers lol.