I was looking for this for reporting purpose but as this flag is not yet available with my current OCI version so couldn't. But fortunitely found same flag in OCUM 9 table. Volume table has flag for volume encryption.
This topic was about the IBM family of devices supported by the IBM SVC datasource.
However, we have recently implemented a similar enhancement for our cDOT Ontap datasource:
On OCI 7.3.5 and earlier (including 7.3.1+ sites running SP 5):
Only the volume object and storage pool in OCI has the isEncrypted boolean, and that was set to true based on the presence of NetApp Storage Encryption (NSE) - i.e, the aggregate was built of encryption capable disks and the feature was enabled. For volumes, the value was determined by the nature of the storage pool it sits on.
We have a datasource patch for environments running SP5, containing an enhancement that will likely ship as part of SP6 and future OCI maintenance releases:
Storage Pool - is Encrypted = True if NSE is in use
Internal Volume - is Encrypted = True if this FlexVol is sitting on an aggregate where NSE is in use OR if NetApp Volume Encryption is enabled at the FlexVol level
Volume - is Encrypted = True if this LUN is sitting on a FlexVol that is sitting on an aggregate where NSE is in use OR if this LUN is sitting on a FlexVol where NetApp Volume Encryption is enabled at the FlexVol level
If this cDOT patch interests you, I can get it over to you - send me a note at ostiguy at netapp dot com