Is this a reason to use VVols on an HPE storage array to support a VMware vSphere environment?

because VVol acts as plug-ins, integrating array monitoring and management on vCenter

A customer has a Microsoft Hyper-V virtualized environment. You are helping a customer replace some of the hosts with an HPE SimpliVity cluster.

Is this a correct guideline for adding and managing the new cluster?

Use the Deployment Manager with Microsoft System Center Virtual Machine Manager (SCVMM) to add nodes to SCVMM one at a time.

Is this a use case for deploying Microsoft Storage Spaces Direct on HPE infrastructure?

providing object storage for a high performance computing (HPC) solution