The Reuters article already states this will happen:
> If it is banned, TikTok plans that users attempting to open the app will see a pop-up message directing them to a website with information about the ban, the people said, requesting anonymity as the matter is not public.
> If it is banned, TikTok plans that users attempting to open the app will see a pop-up message directing them to a website with information about the ban, the people said, requesting anonymity as the matter is not public.