[LilBytes]

same here, but we still have IAM Users for service accounts. E.g. some customers have on premise infra that needs to talk to our services of infrastructure.

Do you know a way where RBAC can be used for the above?

For us, we're using long lived credentials in this space using IAM Users but with very tightly controlled authorisations.

[steelaz]

"IAM Roles Anywhere" was announced just a couple of weeks ago. It might be applicable to your case.

https://aws.amazon.com/about-aws/whats-new/2022/07/aws-ident...