I see this fragment twice in the blog , second and third paragraph in the Introduction

https://cloud.redhat.com/blog/a-guide-to-automatically-reconnecting-managed-clusters-when-restoring-a-red-hat-advanced-cluster-management-for-kubernetes-2.7-hub-cluster

The managed clusters are Kubernetes clusters that are managed by the hub cluster. You can create some clusters by using the RHACM hub cluster, and you can also import existing clusters to be managed by the hub cluster. Since the hub cluster manages the cluster fleet, it is vital that there is a business continuity scenario built in so that when an unexpected event causes a hub cluster to fail, the cluster fleet can be managed by a new hub cluster.

Also a second issue.. if it can be addressed here too :

The name ManagedServiceAddon should be replaced with ManagedClusterAddon