New VM from a copied managed disk

Create a VM from a VHD by using the Azure portal

If you already have a virtual hard disk (VHD) to use or you want to copy the VHD from an existing VM to use, you can create a new VM by attaching the VHD to the new VM as an OS disk.

https://learn.microsoft.com/en-us/azure/virtual-machines/windows/create-vm-specialized-portal

Create a virtual machine using an existing managed OS disk with CLI

Create a VM from an existing managed OS disk that was copied from a managed disk in different subscription

https://learn.microsoft.com/en-us/azure/virtual-machines/scripts/create-vm-from-managed-os-disks

How to create a virtual machine from a disk snapshot using the UKCloud Azure Stack Hub portal

A snapshot is a copy of a virtual disk at a specific point in time. Snapshots are often used as backups, as they enable you to quickly and easily restore a disk to its original state if something goes wrong.

https://docs.ukcloud.com/articles/azure/azs-how-create-vm-from-snapshot-portal.html