In the initial post you write I want, later in the text you write, refrigerator doesn't matter, no idea if a Bosch downdraft extractor is good and a ceramic undermount sink. The latter doesn't exist, for example, because it is technically not feasible.
Your list shows that you haven't dealt with the kitchen topic or you are looking for someone to make the decision for you within a given budget, hoping that you pay an honest price.
To avoid these strange kitchen buying methods, you have to be well informed. Matte and others planned their kitchen for months. They inform themselves beforehand as much as possible about what exists, what do I need, what not, what is practical and what is just fashion.
Your list sounds like it was copied from a girlfriend, a colleague. Proceeding so thoughtlessly means anyone can take advantage of you because you have no idea what actually the best kitchen for you is with a set budget. For €15k you won't get what you listed. Of course, everyone offers you Nobilia because it is one of the cheapest.