NetApp has no immediate plans to add MSA support.
In general, OCI doesn't support direct attached (eg: SAS, etc) configurations. It isn't clear to us what percentage of MSA are FC/iSCSI versus deployed as SAS.
If your array is FC connected, you can manually identify the storage ports as a storage array, this will at least give you host to array visibility.
OCI 7.3 and higher has some capabilites to display data retrieved via SNMP. The MSA does have some SNMP support
https://support.hpe.com/hpsc/swd/public/detail?swItemId=MTX_3f061bd4c08a4dbd977bf4a51d&swEnvOid=2025
But is isn't clear what you are looking to do - I have looked over the FCMGMT-MIB, and it doesn't seem to cover volumes, capacity, etc - it is very FC switch centric. So, I would not be optimistic that much other than the health of the array, and perhaps port statistics are available via SNMP.
Matt