I'm pulling up the authentication app and typing the code on Heroku app but it says"verification code is not correct" so I'm assuming the authentication app somehow doesn't connect with the Heroku. So, how do I change the authentication app without get into the account? Thank you in advance.
I have same problem. I try to recover my own account by email support account-lockout@heroku.com and not recived a answer yet
The time to change the method was until last April 28
Here u can find more information: https://devcenter.heroku.com/articles/mfa-sms
Users who currently rely on SMS as an MFA verification method can continue to use this option till April 28, 2022. The option to use SMS text messages as an MFA verification method is not available for new users.