I realise this action is not quite ready to use yet but couldn't resist having a go.
Just having a look at this promising action and noticed that it uses a now unsupported version
Provisioning EKS on Fargate cluster **** in eu-west-1
2021-10-13 13:52:09 [ℹ] eksctl version 0.69.0
Error: invalid version, 1.16 is no longer supported, supported values: 1.17, 1.18, 1.19, 1.20, 1.21
see also: https://docs.aws.amazon.com/eks/latest/userguide/kubernetes-versions.html
2021-10-13 13:52:09 [ℹ] using region eu-west-1
Also it notice it picked up the wrong region from the yml script.