Metrics explained?

Recently integrated cloudflared into my PiHole solution for DoH. I really dig the metrics feature and I'm presently attempting to build dashboards for the data to augment monitoring of my DNS solution. I've searched high and low and I cannot find the metrics documented anywhere. I've resorted to guessing, but I know I'm getting some things wrong. I apologize if this is the improper forum for this question, and I'd be happy to post this question somewhere more appropriate if necessary!