When following the steps in the documentation to enable tracing in Service Mesh (Configuring Red Hat OpenShift distributed tracing data collection with Service Mesh ), Istio metrics do not appear after creating the Telemetry object (as shown in step 3).

This issue occurs unless the following configuration is added to the Telemetry object:

apiVersion: telemetry.istio.io/v1
kind: Telemetry
metadata:
  name: otel-demo
  namespace: istio-system
spec:
  metrics:
    - overrides:
        - disabled: false
      providers:
        - name: prometheus
  tracing:
    - providers:
        - name: otel
      randomSamplingPercentage: 100

Setting metrics.overrides.disabled: false resolves the issue.

This step appears to be missing in the current documentation.