What information have I provided to TikTok - my email, my birthdate, and maybe a couple other items, of non-security value> What information can they gain from my account? They can see that I like to watch crafting/woodworking videos, funny videos, and will sometimes pause enough to watch a few seconds of hot girls in bikinis dancing around. Oh, no, we've already lost WWIII without a shot fired!
Seriously, though, our country (United States) has no real laws for data brokers or website date security - everything we do (and have done) online is available for a price to anyone willing to pay - even the Chinese government. If the US Govt wants me to believe that they give a shit about my personal data falling into the wrong hands, then they need to create new data security regulations closer to home before worrying about what the Chinese might do with TikTok data - when they can just outright buy EVERYTHING there is to know about us online - plus whatever data is sold on the black market from data breaches at major companies every couple of months. Once the US Govt does something about that (and I don't mean sternly worded letters or hand-slaps), then I'll believe they care about keeping my info private and *THEN* they can start banning foreign apps.
But in the meantime, leave my dancing bikini-clad girls alone!