How to get WebRTC Stats data from a KMS server?

Greetings, I have a question regarding WebRTC Stats metrics, how can I get them at the front, or do I need an OpenVidu Pro license to get them?

I read this article here (https://doc-kurento.readthedocs.io/en/6.12.0/features/statistics.html), it is described there that you can receive status data (jitter, packetsLost and others) using a websocket connection can you tell me how? or is there a ready-made component in OpenVidu that works with this?

I also noticed in the Stream object there are properties of webRtcStats and it has data inbound, outbound, but they are always 0 …

Please tell me how to get WebRTC Stats data from kms server?