Metrics for preemptions / evictions

I’m trying to improve monitoring of pod evictions / preemptions in our cluster. I see the metrics (even in 1.17.9 which we’re using in AKS) here:

However, these metrics don’t show up when I port-forward to prometheus and go to:
http://localhost:9090/api/v1/label/__name__/values

I have seen pods be preempted but these metrics are still missing.

Any ideas where things might be breaking down? The kubelet target is showing 6/6 up for 4 targets for kubelet:

Cluster information:

Kubernetes version: 1.17.9
Cloud being used: AKS
Installation method: ARM template

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