MFA setup and login for new iOS device

I have MFA setup on my AWS account and use Google authenticator. I recently got a new iphone and had to re-install Google authenticator but the AWS MFA setup is not on there. How do I re-add AWS on Google authenticator? All the documentation I've found tells me to login to the AWS console first but I can't do that with MFA. If I had a QR code or setup key for AWS I can do it. Thanks