Does the Service Labeling work for statsd?

we need metrics sent to statsd for each service we have as a backend. Kong does this fine. But ith traefik all we see is

Prometheus does add labels, but statsd does not
The documentation is lacking to say the least, in the metrics section it says


but in the command ref page in the docs it has all lower case
--metrics.statsd.addserviceslabels :

its says the default is true but who can say if that works if the docs cant agree on what the flag is. Anyone got this working?