Login to AWS Console iPhone app with yubikey?

Unfortunately, the AWS Console Mobile App and mobile browsers do not currently support YubiKey security as MFA for AWS. Please refer to the document below:

  https://aws.amazon.com/blogs/security/use-yubikey-security-key-sign-into-aws-management-console/ 

I found a workaround for this "Enabling a virtual multi-factor authentication (MFA) device"; for more details, please refer to the document below:

https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_mfa_enable_virtual.html