Prometheus metrics: traefik_service_server_up missing

I can't find the traefik_service_server_up metric in Prometheus. I'm using the 2.4.6 version and my configuration is:

[Metrics]
[Metrics.Prometheus]
buckets = [0.1,0.3,1.2,5.0]
addEntryPointsLabels = true
addServicesLabels = true

I'm running into the same issue. Did you find out what has happened?