I may have misunderstood the question but if you want to clone the VM perform these steps
1) Go to the Azure Portal and navigate to the Virtual Machine that you want to clone
2) Navigate to the disk , click on the OS disk and then create a snapshot of the disk, repeat the same thing for the Data disk if any
3) Now click on create resource and search for managed disks, fill in all the details and then under source type choose snapshot and then click on create the disk, and do the same thing for the data disk too
4) Once the managed disk for the OS has been created, click on create VM and then when you navigate to the storage section, you can also add the Data disk and this VM would be a clone of the existing VM
let me know if you run into any issue