We highly recommend positioning heavy objects first (such as in-built cabinets and kitchen islands) and then the floor.
Floorify floors are installed floating and must be able to expand and shrink as the temperature changes. Heavy objects such as a kitchen island or large in-built cabinet would block the floor.
TIP: with many modern kitchens and in-built cabinets, you can seamlessly finish the floor by playing with the skirting.