Nuxeo 9.10 deployments with Nuxeo Stream/Kafka on Kubernetes/OpenShift should expose latency to Prometheus, the metrics and monitoring engine commonly bundled with Kubernetes/OpenShift.
If Nuxeo recommends using an off-the-shelf Kafka/Prometheus integration tool for this purpose, such as the one described in this blog: https://blog.godatadriven.com/monitoring-kafka-consumer-lag, then validate and document usage of such a tool.