You can also check the syntax here
Please bear in mind that it will restore the lun within the cluster
As far as I understood from your message you want to restore this lun from a snapmirror destiantion.
Assuming that you want this lun to be restored to original production cluster then this command is not an option here
So I would recommend you to have a look here
snapmirror restore ommand restores the entire contents of a Snapshot copy or one or more files, LUNs or NVMe namespaces of a Snapshot copy from one volume to another volume.