What you should add to your outdoor kitchen is only limited by your imagination. By default, your outdoor kitchen should have a grill of some sort. This could be a gas grill, charcoal grill, pellet grill, or a kamado grill. After that, other cooking appliances to consider would be flat top griddles, power burners, side burners, or pizza ovens. Aside from cooking, there are a plethora of other appliances that help make entertaining easier. You could also consider a refrigerator, sink, wine cooler, kegerator, ice maker, drop-in cooler, trash bin storage, drawer storage, and the like.
There are a wide array of appliances you could put in your outdoor kitchen. Some appliances to consider would be gas grills, charcoal grills, pellet grills, kamado grills, flat top griddles, power burners, side burners, pizza ovens, refrigerators, sinks, wine coolers, kegerators, ice makers, drop-in coolers, trash bin storage, and drawer storage.