https://www.siliconvalley.com/2024/04/24/us-banning-tiktok-your-key-questions-answered/

No, TikTok will not suddenly disappear from your phone. Nor will you go to jail if you continue using it after it is banned.

After years of attempts to ban the Chinese-owned app, including by former President Donald Trump, a measure to outlaw the popular video-sharing app has won congressional approval and is on its way to President Biden for his signature. The measure gives Beijing-based parent company ByteDance nine months to sell the company, with a possible additional three months if a sale is in progress. If it doesn’t, TikTok will be banned.