For an environment that is EKS on the AWS Infrastructure, install options are provided for you in this one location. Remember, there are always more options in the EKS Infrastructure section under Custom Installation and Additional Infrastructure Tools, but this will get you operative in the most common scenario.
If not already done, refer to Get Started section of the documentation for:
Below are the supported environment variables. (Refer to this page to check if your OS is a Supported Operating System.)
In order to install Kommander, you need to have CAPI components, cert-manager, etc on a self-managed cluster. The CAPI components mean you can control the lifecycle of the cluster, and other clusters. However, because EKS is semi-managed by AWS, the EKS clusters are under AWS control and don’t have those components. Therefore, Kommander will not be installed.