Hi,
I’m running in to the same issue.
I think the problem is that the guide you referenced refers to integrating Auth0 with AWS IAM as an external IdP. This method can certainly be used, but the difference (and source of confusion) here is that I and Rohithzr are trying to integrate with AWS’s separate “AWS SSO” service (AWS IAM Identity Center (successor to AWS SSO)).
While you can still use the older method outlined in the Auth0 docs you shared, the separate AWS SSO service is a newer service that makes things a bit easier to manage on the AWS side.
So again, when we say we want help integrating with AWS SSO, we mean the specific AWS SSO service, not the generic meaning of the term SSO.
The AWS SSO service also supports SAML IdPs, but (I think) it requires slightly different instructions; the guide you shared isn’t 100% accurate for the newer AWS SSO experience.