TikTok has never been available in mainland China, a fact that CEO Shou Chew has mentioned in testimony to U.S. lawmakers. ByteDance instead offers Chinese users Douyin, a similar video-sharing app that follows Beijing’s strict censorship rules. TikTok also ceased operations in Hong Kong after a sweeping Chinese national security law took effect.
https://apnews.com/article/tiktok-bytedance-ban-china-india-376f32d78861e14e65ec4bc78e808a0d
Edit: somehow the link gets filtered out by the forum software, just copy-paste it into your browser, it's from Associated Press.