Supporting a low embankment - Which material for the "wall"?

Hello,

we want to support a low slope to the neighboring property so that we can fill up our property a bit more in that area. (see picture)
Since the slope is about 1.2m high at the highest point and slopes diagonally at the boundary, the idea is to build an approximately 80cm high "wall."
I have done some research and found the following possible materials:
- L-blocks (80cm high)
- Wall panels (80cm high)
- Formwork blocks
- Planter blocks (rectangular)
Since I actually want to do this support only once in my life, I am unsure what really makes sense here from a "price/performance" perspective. Maybe a privacy screen should be mounted on the wall later.

I would appreciate feedback.

Best regards
Jochen

L stones will already be too heavy to move with muscle power. We reached a height of up to 2 meters with hollow stones, inserted steel rods, mixed in cement, and it was finished.

Natural stone wall, e.g. made of small boulders. Timelessly beautiful.

: you are probably talking about shuttering blocks?

: Absolutely right: natural stone wall is great. However, in this case I find it difficult. Eventually someone will build and possibly fill in the wall from the other side or build a garage in front of it. However, we are the "upper" property and if I was told correctly, the upper one has to protect the lower one (?) Therefore build a wall while I can still reach it well.

Nobody has to protect anyone. The person who excavates must secure the slope created by this. The person who fills up must in turn secure the slope created by this. If neither, there is no obligation to secure (e.g. with natural terrain). For example, we have a slope 2.5 m high towards the footpath, which is steep and drops off without protection. It does not have to be secured, as it is natural terrain on our property. The city excavated - their problem if pieces fall from the top of the slope onto parked cars. We have a 1.2 m mesh fence in front of it, that’s it.

Regarding the wall: you can also use nicer stones suitable for slope stabilization (there are also hollow ones for filling). I would make it dependent on whether I have to look at it every day.

The most affordable are planting rings. 2 euros each. Without plant. Karsten