Looks like setting up of MFA is not working. It's going in an infinite loop, I get this message "You're almost ready to go!
Check your email to finish enabling two-step verification.". I follow the link and add credentials and it again asks me to go through the same process and then I get the same message. I've worked with bitbucket MFA before, looks like some recently introduced defect.
I am using Microsoft Authenticator on iPhone.