Jan 17: Biden administration says it will leave TikTok ban enforcement for Trump [1]
Early Jan 18: Trump says he will 'most likely' give TikTok a 90-day extension to avoid a ban [2]
Late Jan 18: TikTok makes app unavailable for U.S. users ahead of ban [3]
Midday Jan 19: TikTok begins restoring service for U.S. users after Trump comments [4]
They already knew what was going to happen. They also changed the message shortly after disabling it from "We're working to restore service in the U.S. as soon as possible, and we appreciate your support. Please stay tuned." to "We are fortunate that President Trump has indicated he will work with us on a solution to reinstate TikTok once he takes office. Stay tuned!" [5]
[1] https://www.nbcnews.com/politics/joe-biden/biden-administrat...
[2] https://nbcnews.com/politics/donald-trump/trump-likely-give-...
[3] https://www.nbcnews.com/tech/tech-news/tiktok-makes-app-unav...
[4] https://www.nbcnews.com/tech/tech-news/tiktok-says-restoring...
[5] https://www.nbcchicago.com/news/tiktok-sends-notice-to-users...