As per my understanding, you are using Azure Stack HCI Cluster (Azure 22H2). Yes, it must be registered in Azure for full functionality.
The below article describes how to register Azure Stack HCI with Azure via Windows Admin Center or PowerShell. For information on how to manage cluster registration, see Manage cluster registration.
In case I misunderstood the scenario, please add more details/context to help me better understand.
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Hope this helps.