Hi,
Once the monitoring enabled for HCI cluster and with the help of log analytic agent, you will be able to view the health status of the individual servers, drives, volumes, and VMs. Like complete status view about the cluster.
After completing the necessary configurations, you have the possibility to view the monitor data of a single cluster directly from the Azure Stack HCI resource page or you can use Azure Monitor to obtain an aggregate view of multiple Azure Stack HCI clusters.
I understand, its still uses public APIs. I have used for for some get functions.