This video shows how you can migrate Redhat 7.6 VM into Nutanix AHV using Nutanix MOVE. You will have to edit your grub settings when booting into RHEL on AHV, otherwise you will get a blank screen on the console. In grub, E to edit, move to the "linux" line and insert that at the end of the line "nomodeset". Ctrl-X to boot with this extra argument.