We utilize the Time Tracking feature of GitLab in the issues and merge requests we work on. We utilize this time tracking to help with things like defining our hiring model and measuring workload. As you work issues and merge requests, make sure you utilize this feature.
At the current time, we use these to make generalizations about the support-ops team as a whole.
Once the ability to see more individualized metrics on this feature is available, we plan to use this to find potential cases of burnout and stress. We in no way plan to ever utilize this to determine "how much a person is working". The greatest opportunity we could see with this is helping to locate potential problems and quickly work to resolve them.