The banning of Tik Tok were NEVER about data privacy or national security, because
A.) Banning it alone won't solve the issue, you need law to protect data privacy, US is the ONLY G7 countries don't have such law.
B.) Even if Tik Tok sales its asset to an American company, they can, AND WILL still be getting those data and will be eligible to sell them to anyone who wants it. It changes nothing.
The reason to ban Tik Tok is a commercial one, not because of data privacy or national security. It's either Google is sick of the unfair competition (Google cannot operate in China losing out a chunk of revenue) or Zucks and Musk et el wanted to buy it.
As a general rule, I don't use social media at all, if you don't want to have your detail stolen or sold, don't use them