The most likely, and most effective way would be to prohibit US businesses from conducting business with TikTok, it's subsidiaries and affiliates. Similar to economic sanctions.

Being removed from US App Marketplaces (Apple, Android, Microsoft, Amazon, etc), forbidden from doing business with US Advertising companies (Google, etc), forbidden from Banking in the US, and forbidden from working with US technology/hosting/cloud companies - TikTok rots and eventually becomes untenable to operate within the US.