My building has this, and so do two others in my neighborhood in the unfashionable East Bay. These are all buildings that are 20+ floors. There’s a outdoor space on the top “parking” decks. Then the actual towers are set back on a smaller floor plate. Then there’s outdoor space on the roof deck of the tower.

Not sure what the value to residents in shaded mid-floor outdoor space, vs having sun-filled decks in places that make structural sense. Mid floor parks are just an aesthetic embellishment for people outside the building.