Your questions about SoFi Hong Kong are answered here
Please force quit the app and relaunch. Next, select ‘Not this user’ at the login page, re-enter your email address and password then hit ‘Log in’. You should be prompted to enable Touch ID/ Face ID now.
If you are using an iPhone, please click here for steps on how to force quit an app:
https://support.apple.com/en-us/HT201330
If you are using Android devices, check this out:
FAQ