Also US government hasn't made a specific claim of any imminent security threat posed by TikTok.
From a data security point of view the expert opinion seems to be that there isn't a clear cut case for singling out and banning tiktok.
The ban is therefore undoubtedly a political move, and that is problematic. Things should not be banned on political whims by using executive or administrative measures.
Even legislative has limits, even if Congress passes a legislation banning TikTok, that legislation is likely to be struck down by the court is my guess.
Ultimately banning TikTok is not a tenable democratic solution to whatever real or perceived problems it is causing.
Some of the commenters here seems to want the democratic US government to suddenly grow authoritarian powers.