Using bulk enrollment for Windows devices by creating a provisioning package with the Windows Configuration Designer (WCD) app, the join type will be Azure AD joined and the owner is like package_xxxxxx and Intune Primary user and Enrolled by fields will remain empty after successful EntraID Cutover.
Even if the “Enrolled by” and “Primary User” fields are blank, the device can still stay compliant as long as it meets the “Has Compliance Policy Assigned” and “Is Active” conditions.
This is by design