TikTok update

Was scrolling and suddenly I had a pop up asking to confirm my birthday to make sure I’m of age. Uhmmm when I made the account I had already put my birthdate. Why is it asking all of a sudden after years or else they will remove my account?? Then it took me to a page to sign back in with Face ID only. It won’t provide me the option to sign in with my password!!! I’ve never signed in with a Face ID only TikTok! What the hell!