It would be helpful if you can share a bit more context as "Alert Monitoring" could be interpreted many different ways.
If you are referring about how an Operator monitors Alerts in the Admin portal and how an end user could integrate those alerts into an external monitoring system then please check this document.
Also, please note that there is not a similar thing in Azure as the operations model is different. If you are referring to something else when you say Alert Monitoring, as in how would you integrate Tenant Workloads, for example VMs into Monitoring then it is very similar to Azure as both integrate with the same Azure cloud service (note this does not exist in a disconnected deployment, refer).
If your ask is neither of these then please provide a bit more detail so we can assist in pointing you in the right direction.