Ive added a small piece of aluminum angle with double sided tape to the left of the UI screen on my C2500 to hold an iPad in place, these are standard on the QU series desks why not on DLive.
Cheers
Because you shouldn’t have to use an iPad when you’re mixing on a dLive. 
If you want, you can get a strip of wood, mount some magnets on it and place it on the surface.