Single-family house without a basement on a slope

And actually, everything is completely different, right?

Yes, everything is completely different :/

I would take one meter from the kitchen to have more space in the dining area.

That was also my thought, as the kitchen is somewhat too large for us personally.

I don’t buy that! Or you belong to the 1%...
The OP has a living area of 55 sqm... we have that too.., most have between 36 and 50 for the LIVING AREA... about 15-20 sqm of that goes to the living room. Which category do you belong to?

Proof:

I had some fun putting the furniture into a 3D sketch. I think you’ll have to rearrange the furniture a bit to get a flow in the open-plan room.

I had some fun placing the furniture into a 3D sketch. I think you still need to move the furniture around a bit to get a good flow in the open-plan room.

Yes, that's true, thank you very much for the effort :) What program did you use for that?

I would leave out the kitchen island and place the dining area exactly there in the kitchen. That way you have a nice space between cooking/eating and the living room. If the kitchen island is absolutely necessary, reduce its size. Do you really need the bar? That takes away another good meter from your dining area, even though there is a proper table 1.5 meters further.