Your kitchen space is not easy to "work with," but the design has succeeded quite well in that regard. I have good experience with Siemens appliances myself – I haven't looked further into the selected models. At the time, we chose the respective top models due to a minimal price difference during the pricing process. A good salesperson calculates so that it pleases their customer and yet leaves enough margin. Possibly, they were able to win me over just as easily.
There are a few aspects where I see some "tricks and catches," which I'll simply share with you.
The handles are supposed to be all in the middle, regardless of whether it's a drawer or a normal door.
This visually appealing feature costs practicality in daily use.
We also haven't decided yet what we want to use as niche decor (that is, on the wall).
Consider requesting the same material as the worktop in a thinner version – if you like this look.
In the kitchens of our children’s apartments, we used colored glass.
Wall next to the door
[*]there is supposed to be possibly a refrigerator with French doors, placed centrally on the wall next to the door
[*]to the left of the refrigerator is to be the stove, and to the right the dishwasher (raised)
As this combination is drawn, the refrigerator protruding further will impair the practical use of the oven. The oven is positioned so that the path with a baking tray or form to the worktop is quite long. With a bit of bad luck, there might also be a collision since the oven is in the "runway."
From a practical point of view (and visually much calmer), a large built-in refrigerator (or two...) is the better solution. I would place the oven further from the entrance area and closer to the opposite work surface – or directly near the cooktop, which would require a tall cabinet, for example next to the window, if placed at a comfortably high level.
Wall next to the door
[*]it would be nice if the dishwasher is the same height as the stove, but then it would be very high and apparently not possible with the manufacturer according to the planner
Don't make the dishwasher higher – unloading the upper area will then no longer be enjoyable.
Wall to the right of the full-height window
[*]the height including the worktop is in my opinion 90 cm and the plinth 10 cm (but I am not sure)
[*]the stove should be 90 cm wide and we decided on a hood since a cooktop with extractor would be even more expensive and louder
[*]the sink should be centered to the window
[*]we are undecided whether to take a ceramic sink from Franke or from the other simpler material
[*]the sink should be Cashmere or something like that
[*]at the end of the L-shape, we have a cabinet with a carousel
Wall to the right of the full-height window
[*]the height including the worktop is in my opinion 90 cm and the plinth 10 cm (but I am not sure)
Definitely try out the working height.
Wall to the right of the full-height window
[*]the sink should be centered to the window
Make sure the faucet does not obstruct the opening of the window.
Wall to the right of the full-height window
[*]at the end of the L-shape, we have a cabinet with a carousel
The "carousel" only serves to make an otherwise hard-to-reach storage space more conveniently accessible. There are various mechanisms for this. If you know what you want to put there, then you can decide whether you want it at all or which mechanical solution is suitable.
Although I am quite fond of beauty and aesthetics, I am less willing to make concessions regarding ergonomics in the kitchen than in other areas. In your design, the distances, especially from the refrigerator to the cooktop, as well as between the cooktop and the oven and between the oven and the work surface, are too far. I am not an experienced kitchen planner and therefore do not have a better suggestion offhand. There must be good reasons why the kitchen layout in the house design did not play a major role.