// change physics with BouncingScrollPhysics()

 ListView.separated(
    physics: BouncingScrollPhysics(), // here
    separatorBuilder: (BuildContext context, int index) {
        return SizedBox(
            height: 8,
          );
        },
    itemCount: zones.length,
    itemBuilder: (_, i) => cardStyleZone(zones[i]),
),