A majority of Americans consider TikTok to be a national security threat. Chinese state-sponsored snooping is globally notorious, and there's no reason to take the company at its word that it's not violating the privacy of US citizens. It's just due diligence that an app that could facilitate spying by the Chinese Communist Party should stay off government devices. ByteDance should be forced to sell off TikTok if they wish to continue operating stateside.
Leaders on both sides of the aisle are leading a cynical assault against TikTok to foment anti-China sentiment, with there being not one shred of evidence that the app is used for espionage purposes by China. TikTok collects no more data than American tech platforms but is under much more scrutiny. The TikTok crusade is bordering on hysteria, as US leaders ignore the grave privacy concerns posed by Western social media platforms.
There is a 15% chance TikTok's US operations will be sold to an American entity by 2024, according to the Metaculus prediction community.