There's no reason to believe that TikTok cares about your privacy or your security, and their app probably recorded everything you ever copy-pasted (even outside of the TikTok app) and probably sent it back to the Chinese government:
https://www.macrumors.com/2020/06/25/tiktok-clipboard-access-ios-14-caught/
If you ever copy-pasted a password, you need to change that password now, and I'd highly recommend that you uninstall and never use TikTok it again
#quittiktok #quitfacebook #quitinstagram #quittwitter #quitsnapchat #quitwhatsapp