Do you still want to see it in SM?
There are several options, depends on your desired workflow (just to mention two :)):
- You could just unassign the device from SM on business.apple.com
- You could create an own scope for development, create a seperate DEP profile and a seperate push profile without any restrictions.
This issue could be related to the restriction "do not allow pairing" or maybe it's just the typical weird behavior from XCode, I face this issue sometimes with my private iPhone.