The Couchbase team has been working on a feature called Response Time Observability (RTO) and we are looking for feedback from the Couchbase community!
Long story short, in 3.x this is being reworked as we want to align to the OpenTelemetry project. We have a set of the existing functionality though. See also the updated sdk-rfc on updated Response Time Observability.
If there’s something specific you’re looking for and cannot find, I’d be glad to try to point you in the right direction.