EKS image retention policy

There are multiple EKS images available for every EKS Kubernetes version (1.23, 1.24, …). When an EKS Kubernetes version is no longer supported by AWS, all the images for that unsupported version are deleted from the Canonical AWS account, except for the latest released one.

Say the currently available images under the Canonical AWS account are:

ubuntu-eks/k8s_1.24/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20221214
ubuntu-eks/k8s_1.24/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20221206.1
ubuntu-eks/k8s_1.23/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20221214
ubuntu-eks/k8s_1.23/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20221011
ubuntu-eks/k8s_1.23/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20220822.2

If EKS 1.23 is no longer supported, it would result in the deletion of the following two images:

ubuntu-eks/k8s_1.23/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20221011
ubuntu-eks/k8s_1.23/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20220822.2

but the latest image ubuntu-eks/k8s_1.23/images/hvm-ssd/ubuntu-focal-20.04-arm64-server-20221214 would still exist.