Where you enter a six-digit code, for two-factor sign-in and setup, changing your email address, or deleting your account, the field is now sized for the code, with its digits spaced and centred. Once the code is sent, a small spinner inside the field shows that it is being checked.
A field sized for the code
Six-digit code fields are now sized for six digits, and show that the code is being checked once it is sent.