Confirm the nodegroup you’re checking actually exists (e.g. you’re looking for pods running under product-team/fubar) by listing all the nodegroups in a certain namespace:
get nodegroup -n product-team
Get the nodes under that nodegroup:
get nodes -o wide | grep fubar
Get the pods under those nodes (replace NODE_NAME_GOES_HERE with the name you got from the command above, e.g. ip-10-111-22-333.ec2.internal):
k get pod --field-selector=spec.nodeName=NODE_NAME_GOES_HERE -owide --all-namespaces