You cannot create managed node groups.
You can follow the guide in the post above this to create a cluster using unmanaged nodes.
Hi,
I found a repository that i taked as a base and modified it to be able to create an eks cluster in aws with terraform, compatible with kodekloud permissions, it does not use the eks module or node groups,
With this repo it is not necessary to use the aws gui, i changed the readme to explain the modifications
I hope it is useful to you