Link to “Password & Email” page on Settings (you will need to be logged in to see what I describe below):
https://www.reddit.com/prefs/update/
Once your email has been verified, you’re then shown this message:
Enable Two-Factor Authentication
Two-factor authentication provides increased security for your Reddit account by requiring a one-time use code along with your username and password.
Your email is xxxxx@xxx.com. Make sure this is correct before continuing.
Learn more
there doesn't seem to be anything here