Construction of 2 retaining walls, development plan BW

And I always also think about maintaining the difference between neighborhood and war. That includes not building a fortress on a general's hill just because the building code doesn't punish it with the guillotine.

From a certain slope angle, ground cover plants and mats also do not hold during heavy rain.
Only the responsible building authority can really give you the answer here, since no one here knows the complete development plan, the terrain of the construction area, and the exceptions approved up to that point. Normally, the maximum limits for the different types of enclosures and reinforcements are not additive. So if a retaining wall is specified with a maximum of x cm and fences with y cm, it does not mean that you can simply stack the two measurements on top of each other.

The development plan doesn't seem to be taken very seriously somehow. Then everything is fine. Just ask the building authority whether your retaining wall and slope are approvable. But I wouldn't dare to go into the race with 45 degrees. For the slopes by the street, for example, my mentioned 1:2 is required.