First along the short side of the house

I have now looked at the plans again. In addition to the south orientation, it should be noted that with a rotated roof we would have less standing height in the attic. A dormer is actually not possible due to the 2/3 regulation in Schleswig-Holstein.
We can raise the knee wall to a maximum of 1.04 meters above the finished floor level.

I would not rotate the roof because of photovoltaics. They are already making south-facing photovoltaics unattractive for private owners.

Not only do you no longer get compensation at noon; now they generally want to charge for feeding electricity into the grid. One can only hope that at least a pricing model will prevail that rewards grid-friendly feed-in.
So better photovoltaics facing east/west.

You can definitely design a beautiful house with enough height in the attic.

I have a south-facing system without storage and it often annoys me: I would like to start the washing machine early in the morning, but there is not enough power yet. Or cook something in the evening.

I wouldn’t rotate the roof just because of photovoltaics. They are already making south-facing photovoltaics unattractive for private owners. Not only do you no longer get compensation at noon; now they also want to generally charge for feeding in. One can only hope that at least a pricing model will prevail that rewards grid-friendly feed-in. So better photovoltaics facing east/west. You can definitely design a beautiful house with enough height in the attic. I have a south-facing system without storage, and it often annoys me: I would like to start the washing machine early in the morning, but there isn’t enough power yet. Or cook something in the evening.

I can totally relate to that by now! Besides photovoltaics, we now also have the standing height issue in the attic. We can’t raise the knee wall any further..

Why is or should the construction at the boundary distance be allowed? Currently, it is only 1.15! Has this been approved? And if so, by whom?

Why is or should the construction be allowed at the boundary distance? It is currently only 1.15! Has this been approved? And if so, by whom?

The OP says ...

The property is located next to a 4 meter wide private road,

... so probably settlement up to the middle of the road.