Hello,
Here are some resources that might help:
- Uptime Monitoring with Heartbeat and the Elastic Stack | Elastic Blog
- Creating a custom ServiceNow incident report dashboard in Kibana Canvas | Elastic Blog
- I also came across this discuss issue if it helps: Calculating MTTR(Mean Time to Recovery)
I'd encourage you to search our blogs and this forum, both are excellent resources for getting up and running with visualizations.
Regards,
Aaron