A custom, high end contractor has a similar unit to the 'Sargento' wall unit with the built-in appliances; it is an imported item, I believe from Italy. It was installed 'to 2008 NEC' requirements. Three (3) 120/20 countertop circuits, etc.
The 'rough' for the required circuits and spacing issues was achieved via a nice plugmold install. The lighting circuits were also field wired, luminaires came with cabinets; UL/TUV labels.
Looking briefly thru the linked site...seems to be all european goods; I did not see any reference to any listings.
As to cabinets with UL labels? I never gave that a thought, although we do check all electrical devices.