I just added it, it’s at the bottom of the settings page for me. It’s a bit awkward to add. You have to copy the TOTP URL and paste it into your app of choice, and unlike other 2FA flows I’m familiar with, you don’t enter a TOTP to confirm that you’ve configured 2FA - it’s just on once you check the box and click save. So definitely don’t log out until you save the TOTP secret somewhere.
I just added it, it’s at the bottom of the settings page for me. It’s a bit awkward to add. You have to copy the TOTP URL and paste it into your app of choice, and unlike other 2FA flows I’m familiar with, you don’t enter a TOTP to confirm that you’ve configured 2FA - it’s just on once you check the box and click save. So definitely don’t log out until you save the TOTP secret somewhere.