Because result of the registering is ignored [here](https://github.com/fiadliel/prometheus_client_scala/blob/f3f94a4b6efce1378450cd19aea50e36c5978537/client/shared/src/main/scala/org/lyranthe/prometheus/client/registry/MetricFamily.scala#L17) the new metric appears to be registered but no observations are visible on the reading side.
Because result of the registering is ignored here the new metric appears to be registered but no observations are visible on the reading side.