Your questions about SoFi Hong Kong are answered here

We take your account security seriously. For protection, we have implemented Two-factor Authentication for all of our app users and all users’ devices will need to be registered. You will be asked to register your device when you sign in from an unregistered device.

To ensure it is you signing in, a 6-digit code will be sent to you via SMS or an authenticator (dependant on your choice of verification method). Please input the code to register your device.

Once you have successfully verified and registered your device, you can then continue to use the device to login to your account as usual.