How to enable exemplars with User Workload Monitoring

[ahus1]

I want to use exemplars with my user workload monitoring to connect metrics to traces.

What I found: something was implemented here - openshift/cluster-monitoring-operator#2161 - and I found the sendExemplars option in the API. It seems connected to remote write, but I want to use it with the regular built-in Prometheus / Thanos queries etc. that comes with OpenShift.

I'm using a Grafana that is deployed on OpenShift and that points to https://thanos-querier.openshift-monitoring.svc:9091

What I tried already:

  config.yaml: |
    prometheus:
      remoteWrite:
        - sendExemplars: true
          url: https://***

After that UWM Prometheus was deployed with the exemplar feature enabled, but complained while the remote URL wasn't present.

I still can't see the exemplars in Grafana. What am I missing? Is it supported at all?