External m2 case provides power and connection.
however, cloning from older motherboard, different disk drive to new m2 drive being put on a new motherboard with different cpu, chipset, drive, etc will make the old OS barf as it likely does not have the right drivers for the motherboard, etc. Applies to windows, linux, etc.
BTW, you may find Ubuntu a better bet in the Linux world. While SUSE was fine for many years, they have struggled as RedHat and Ubuntu dominate the Linux world over the past decade or so.