You can plan the kitchen yourself. Ikea offers an online planner. It’s mediocre, but fully sufficient for kitchen planning.
The appliances from Ikea are usually AEG, the most expensive dishwasher is from Bosch. If you want external appliances, that’s no problem. For the dishwasher, you have to make sure it is XXL (you can see if an 80cm front can be mounted) and has a Vario hinge. The term Vario hinge comes from Siemens, with other manufacturers it unfortunately is called differently. AEG has this as standard in all dishwashers. You only have to pay attention to XXL. That fits right away.
I myself have an AEG dishwasher. It feels a bit plastic-like on the inside, but washes and dries super well. And was cheaper than a model at Ikea. I wouldn’t buy extractor hoods at Ikea at all. You can forget all of them, they make noise and just serve as a lamp.
If the budget isn’t too high, it’s worth looking for second-hand ovens. Right now many good things are being discarded because there are new techniques like steam in ovens. Ovens from Ikea are really good. You can’t go too wrong in the better categories. Refrigerators from Ikea are okay, but not very quiet.