How to get node information using sdk

kubectl get nodes <NODE_NAME> -oyaml returns information about the node that includes the EC2 instance ID:

apiVersion: v1
kind: Node
metadata:
  annotations:
    node.alpha.kubernetes.io/ttl: "0"
    volumes.kubernetes.io/controller-managed-attach-detach: "true"
  labels:
    alpha.eksctl.io/cluster-name: <CLUSTER_NAME>
    alpha.eksctl.io/nodegroup-name: <NODEGROUP_NAME>
    beta.kubernetes.io/arch: amd64
    beta.kubernetes.io/instance-type: m5.large
    beta.kubernetes.io/os: linux
    eks.amazonaws.com/capacityType: ON_DEMAND
    eks.amazonaws.com/nodegroup: <NODEGROUP_NAME>
    eks.amazonaws.com/nodegroup-image: <AMI_ID>
    eks.amazonaws.com/sourceLaunchTemplateId: <LAUNCH_TEMPLATE_ID>
    eks.amazonaws.com/sourceLaunchTemplateVersion: "1"
    failure-domain.beta.kubernetes.io/region: <REGION>
    failure-domain.beta.kubernetes.io/zone: <AVAILABILITY_ZONE>
    k8s.io/cloud-provider-aws: <ID>
    kubernetes.io/arch: amd64
    kubernetes.io/hostname: <HOST_NAME>
    kubernetes.io/os: linux
    node.kubernetes.io/instance-type: m5.large
    topology.kubernetes.io/region: <REGION>
    topology.kubernetes.io/zone: <AVAILABILITY_ZONE>
  name: <HOST_NAME>
spec:
  providerID: aws:///<AZ>/<EC2_INSTANCE_ID>

The spec.providerID gives you the AWS AZ and the EC2 instance ID. With those items, you could use the SDK to look up additional instance info.