Sophos XG Cluster
it would be important so be able to identify (and modify) a XG-Cluster and its state in Central.
Actually a cluster-member is marked as not available, which, in fact, is not quite the correct system state of a A-P-Cluster Member (for the backup-device)

We are working on improvements to support of HA firewalls, and will release this in two stages. Stage one will be available in a amatter of days, allowing both members of an HA pair to be registered to Central, and placed in the same management group.
Phase 2 will follow in a matter of months, and will make joining both devices to Central easier, and will show members of an HA pair as a single logical device in Central, reflecting the HA state, current primary device, etc..