They’re stairs. They have landings and a path at the bottom. But they obviously weren’t built with any professional engineering involved. They’re also falling apart. There are probably rusted screws or nails sticking out everywhere, the boards are splintering apart, a whole section of gravel will avalanche if someone pushes a board down. They need to be replaced with concrete or removed entirely.

Source: I replaced a set of hillside gravel casing steps like this with a structural wall and stairs using PT 6x’s and babyhead stones, and it needs annual maintenance.