An a non-American the level of anti-TikTok sentiment seems really weird, it really does just seem like sinophobia - especially given there's no proof that TikTok is actually being used by the Chinese, whereas Snowden etc. has shown us that the USA already does stuff like this. I'm not really sure what the People's Liberation Army will do with all my cat videos anyway...
That said, I would caution against the temptation to “grade on a curve” here. While it’s true what you said, that there’s no direct evidence of spying, the case of proven US spying should demonstrate that government are more likely to be spying and hiding it than not.