OTP
Verification code. The first field carries autocomplete=one-time-code, which is what makes iOS and Android offer the SMS code right on the keyboard.
6 and 4 digits
Type and focus moves forward on its own; backspace in an empty box moves back. Pasting the whole code fills every box at once.
Verification code
4-digit PIN
@components.OTP(components.OTPProps{Name: "code", Label: "Verification code"})