Hey,
You can take a look at Azure Stack HCI to build hybrid cloud between on-prem and Azure. Check for more:
https://learn.microsoft.com/en-us/azure-stack/hci/hybrid-capabilities-with-azure-services
I am not sure if it will work in Domain Independent scenario.
As another option, you can take a look at StarWind VSAN to build hybrid cloud between on-prem and Azure. VSAN will handle replication and provide shared storage for Failover Cluster.
https://www.starwindsoftware.com/starwind-virtual-san-hybrid-cloud-for-azure
Cheers,
Alex Bykovskyi
StarWind Software
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