It’s 6 or 8 digits because it’s an oath totp or hotp, it’s quite a standard. At least they don’t reinvent the wheel, even those that seem proprietary use a stan

It’s 6 or 8 digits because it’s an oath totp or hotp, it’s quite a standard. At least they don’t reinvent the wheel, even those that seem proprietary use a standard algo underneath. Example: Duo security uses a 6 digit hotp.