AWS IAM having issues yet again

Maybe a stupid question, but isn't IAM related to almost any API access to AWS as it's used for authorization and authentication through a combination of identities and policies? Or does this outage only affect the meta level being access to IAM itself through its own API?

Does anyone know of good IAM learning resources? They (along with networking) are the biggest barriers I have from using AWS.

AWS Identity is truly awful. It is not extensible and it lacks critical features. AWS has an opportunity to put companies like Okta out of business but their Identity team doesn't have the vision.