I hope you have this issue figured out, If you haven't I would start by checking that the replicated LUN and the datastore LUN are the same backing device, and that you have followed vendor (HPE) recommendations on how to setup the replication, Sam needs some custom settings on some array platforms to enable the LUNs to show up.Typically the issue is in replication or SRA configuration and VMware would lean on the array vendor for help and guidance on their best practices, in this type of issue.
Good Luck,
vFouad