This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.
Cases are used to open and track issues directly in Kibana. All cases list the original reporter and all the users who contribute to a case (participants). You can also send cases to external incident management systems by configuring connectors.
If you create cases in the Observability or Elastic Security app, they are not visible in Stack Management. Likewise, the cases you create in Stack Management are not visible in the Observability or Elastic Security app. You also cannot attach alerts from the Observability or Elastic Security app to cases in Stack Management.