Azure Backup provides a simple, secure and cost-effective solution to back up your Azure Virtual Machines (VMs). Azure Dedicated Host provides physical servers that is dedicated to your organization and workloads whose capacity is not shared with other customers. This host-level isolation helps address compliance requirements. To protect your resources, Azure Backup now supports backup & restore of Azure Virtual Machines with dedicated host. This is available in all the region where Azure dedicated host is available.
Read the documentation.