In Feng Shui, we always try to favour a good circulation of Chi. The layout must be designed to ensure that the circulation is fluid. In this context, the central island (very fashionable at the moment) is not necessarily a good idea. In a kitchen with little space, it clutters the space and creates four sharp corners.
The cook should avoid turning her back to the door when preparing food. If possible, he or she should face one of its favourable orientations, especially the Tian Yi orientation, which governs health (see my article on the kua number).
Finally, we try as much as possible to keep fire (the hob, the ovens) and water (the sink, the dishwasher, the fridge) away. Why should we do this? Because yang/masculine fire and yin/feminine water do not have the same energy, we don’t want them to come into conflict, which would encourage quarrels between family members. When the room surface does not allow it, you can use wood (a large chopping board for example) between the sink and the cooker, or provide wooden fronts if the oven column is next to the fridge.
Once again, I repeat myself, but the ideal is to intervene as soon as possible when you are trying to improve your life thanks to Feng Shui: it is much easier to foresee the water and gas supplies, the sockets with the right amperage, etc., before doing any work.