How expensive were the paving works at your place?

Ok, where you have the curb, his people have cast a shoulder support out of screed concrete. It holds.

Ok, where you have the curb his people have pulled some kind of shoulder support out of screed concrete. It holds.

I also have no curbstones.
Only the eave edge.
But it is the rule that curbstones are set.

Curbstones can also be omitted if the side paving stones are set in concrete or have a back support.

We have a granite curb as a boundary stone. It then matches our granite pillars, which compensate for the height difference to the adjacent public path.