Spot foundations immediately behind unreinforced L-stones

Hello and thanks in advance for the help.

We have filled up our plot to have everything on one level. For this purpose, the resulting slope at parts of the property boundary was retained with unreinforced L-shaped stones. Mostly 80cm and 60cm high stones were used.

Now a fence is to be placed along the boundary. This should be mounted on point foundations and not on the L-shaped stones (since they are unreinforced).

Now, in this context, one often reads that foundations must be founded frost-free. But the L-shaped stones do have a frost-free foundation.
If I now dig a hole above a 60cm high L-shaped stone down to the base of the stone and build my point foundation on it, that is frost-free, isn't it?
Or are there smarter ways to set the fence here?

I would appreciate feedback :)

Or are there smarter ways to install the fence here?

Simple double rod panel fence? You would simply install it as follows: drill a 30cm hole into the ground with an earth auger, pour in screed concrete, add water, and then set the post in. That's how the fence builders do it here.

Simple double wire mesh fence? You would simply install it as follows: drill a 30cm hole into the ground with an earth auger, pour in screed concrete, add water, and then set the post. That's how the fence builders do it here.

Thank you for the quick response. Exactly, simple double wire mesh fence in sections with privacy screen elements. Are 30cm really enough? That definitely is not frost-free then.

Privacy elements are sail surfaces, therefore wind load, the posts longer and deeper (50cm)

And what about the topic of frost-free foundation? That hasn't been mentioned so far :D How does it behave with backfilled soil behind L-walls? If the fence foundation basically rests on the foot of the L-wall. Can I prevent Frost heave with that?

We did the same with our carport. On the side facing the neighbor, we could logically only dig the foundation holes down to the foot of the (reinforced) L-shaped concrete block (~60cm). Then concrete was poured, H-anchors set, and the carport was constructed. And where should the frost heave come from? Under the concrete of the fence post there is also concrete in the form of the L-shaped concrete block foot. After that comes the frost-free foundation / gravel layer of the L-shaped concrete block. So I don't see any problem there. Our carport is still standing too!