I don't have enough reputation to add a comment to VAS's comment, so I have to add "an answer" here to remind people reading this page.

The kubectl proxy and the kubectl port-forward don't work the same way.

To be short, kubectl proxy requires the Kube-apiserver access resources like pod/node/svc via clusterIP.

And port forward requires the Kube-apiserver coordinates with kubelet to forward the traffic.

Such difference will cause different user experience in some Serverless K8s Distribution.