Horizontal Pod Autoscaler - not 0%/2%

All the kubectl get commands indicate I have the expected set-ups according to the Readme, all the way down to the section on horizontal pod autoscaler.

Thus, I’ve just enabled the metrics-server and then run the next part:

kubectl apply yaml/autoscale.yaml

My terminal gives: horizontalpodautoscaler.autoscaling/tf-serving-hpa created

So then I run kubectl get hpa as instructed.

The expected output in the Targets column is apparently meant to be 0%/2%, like so:
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE tf-serving-hpa Deployment/tf-serving-deployment 0%/2% 1 3 1 38s

But instead I’m getting 20%/20% under Targets, as follows:

NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE tf-serving-hpa Deployment/tf-serving-deployment 20%/20% 1 3 1 16s

What is the significance of this please? Has something gone wrong ?

Could you please try this lab again and confirm if you need help with this one?