Regulation on the slope and height of retaining walls

, ...slandered is not correct. Building land on a slope is in high demand and expensive with us because of the view. That is also the reason why no fence is to be built there. Where does the "step depth" of 1m come from before the next height step occurs? Gut feeling? A "sufficiently large area" according to building regulations => fall protection can also be 0.6m ... or? Because of DIN EN 12811 (among other things, the width of working scaffolds) I arrive at 0.6m. But this could also be the wrong approach here.

, ...as long as nothing happens. But if there is a personal injury at your 6m climbing wall (keyword: care case), the insurance will look closely at whether it has to pay or pass the claims on to you.

Where does the "step depth" of 1m before the next height step comes from? Gut feeling?

Gut feeling for what a magistrate judge would consider appropriate. In fall protection, the aim is to take the intentional (sporting or playful) jump as the standard: where one lands less safely than in that, the fall (= unintentional jump, fall) should be avoided.

as long as nothing happens. However, if there is a personal injury (keyword: care case) at your 6m climbing wall, the insurance will look closely to see whether it has to pay or passes the claims on to you.

My argument is not about HOW IT IS BUILT, but WHAT IS ALLOWED TO BE BUILT.
You are asking two independent questions! Once about the approved height, once about the technical execution...