My team is responsible for about 200 microservices being deployed, some of them have 10 or more pods. We don't do continuous delivery. Instead it's done by 5 different groups deploying once every week or two.

Our production deployment jobs are in Jenkins and isolated. It's easy to check what was deployed when. We also have a script written that can run an environment report to see what versions and which microservices have been deployed. Along with their CPU/memory allocations, number of pods etc.

Release management tracks which JIRA stories are in which release, they do it mainly by looking at master merges between prod deployments.