Try this NQE query.

/**
 * @intent Unique MAC Address counts and their details
 */

foreach device in network.devices
foreach networkInstance in device.networkInstances
foreach macEntry in networkInstance.fdb.macEntries
group { deviceName: device.name, macEntry } as macEntriesPerAddress
  by macEntry.macAddress as macAddress
let deviceNameAndMacEntry = min(macEntriesPerAddress)
let macEntry = deviceNameAndMacEntry.macEntry
select {
  Device: deviceNameAndMacEntry.deviceName,
  "MAC Address": macAddress,
  "Address Count": length(macEntriesPerAddress),
  OUI: ouiAssignee(macEntry.macAddress),
  Type: macEntry.entryType,
  Interfaces: (foreach i in macEntry.interfaces
               select if isPresent(i.subinterfaceName)
                      then i.subinterfaceName
                      else i.interfaceName)
}