As of September 20, 2020, for WeChat and as of November 12, 2020, for TikTok, the following transactions are prohibited:

1. Any provision of internet hosting services enabling the functioning or optimization of the mobile application in the U.S.;

2. Any provision of content delivery network services enabling the functioning or optimization of the mobile application in the U.S.;
   

https://www.commerce.gov/news/press-releases/2020/09/commerce-department-prohibits-wechat-and-tiktok-transactions-protect