Update - They appeared on esrs.emc.com. So we still create the cluster on that site, then conduct a migration from esrs.emc.com to esrs3.emc.com.
The client has existing gateways which I can see under cluster mgmt. However, we've stood up 2 new gateways and need to pair them together for a new cluster. It was easy to find on esrs.emc.com, but I cannot find it on esrs3.  Can someone point me to it or tell me what the alternative method is now, please?
Cluster Mgmt on esrs3.emc.com