Biden said (a day or two ago) he will leave enforcement of the ban up to Trump, and ByteDance have been fighting against the ban since it was ever suggested ... so why do you think ByteDance are now voluntarily shutting down access today?!!
It's really no mystery - Trump has already been talking to ByteDance and agreed to let them continue operations in return for favors to himself which have yet to be discovered. As part of this deal, Trump requested ByteDance to shut it down today, so that he can be the hero and have it reenabled tomorrow or soon after (according to how he wants the optics to play out - pretending to take some time to "make a deal", or an immediate "day 1 - look at how great trump is").
You people are being manipulated like sheep. Calm down, it'll be back very soon.