https://www.techdirt.com/articles/20200915/23500745316/wechat-users-fighting-to-block-trumps-executive-order-banning-app-us.shtml

While the TikTok part of Trump's original August Executive Order got all the attention, we pointed out that it was fairly notable that he issued a nearly identical order to also effectively ban WeChat by blocking any transactions related to WeChat. While WeChat is not that well known or widely used in the US, it is basically central to the Chinese internet, and, as such, is a key part of how many Chinese Americans stay in touch with relatives, friends, and colleagues back in China. So it was perhaps not that surprising that a group of WeChat users in the US quickly sued to try to block the order:

Neither the Executive Order itself nor the White House provided concrete

national security. Notably, no other nation has implemented a comprehensive WeChat ban

on the basis of any like-finding that WeChat is a threat to national security. The

Executive Order was, however, issued in the midst of the 2020 election cycle, during a

time when President Trump has made numerous anti-Chinese statements that have

contributed to and incited racial animus against persons of Chinese descent—all outside

of the national security context.