1. Proposed title of this feature request
Create integrated alert system for Service Mesh

2. What is the nature and description of the request?
Integrate alert system to Service Mesh Monitoring Stack.

3. Why does the customer need this? (List the business requirements here)
Now you should make different instance [0], so you'll end with several additional Prometheus instances which isn't scaling well.
Monitoring deployment is a vital topic for the client.
From the article:
It was necessary to deploy a parallel Prometheus/AlertManager/Grafana to work around some of the limitations of the current ServiceMEsh observability stack. This may improve in future releases.
[0] https://www.openshift.com/blog/monitoring-services-like-an-sre-in-openshift-servicemesh