Backup codes aren't provided unless you have enabled 2 factor authentication via authenticator app.
The expectation is that you will always have access to your email address. Chances are your email account is secured via similar 2 factor means.
With an authenticator app, its possible that I lose access to the device with the app on it - for example, if I were to trade in my phone and get a new one. Backup codes are in place for that purpose, allowing me to provide one of them to verify its me attempting to log in so that I may disable the existing authenticator and re-enable it, using my new device to generate codes.
That scenario doesn't apply to an email account, so there is no need for Jagex to provide backup codes to players who are only using email-based verification.
25-Jun-2023 23:13:14