Support spot instances (GCP + AWS)

It would be helpful if there was spot instance support for EKS clusters. We use spot instances in our non-critical clusters (dev and testing).
We use eksctl to create spot node groups as follows:
managedNodeGroups:
name: my-new-asg
instanceTypes: [“c5.2xlarge”, “c5d.2xlarge”, “c5n.2xlarge”, …]
spot: true

This is nice because it's all managed within our AWS account, and we don't have to signup for external services.