How to use React Native Paper Checkbox or Checkbox.Item using flat list?

You can only check and uncheck at once with the current source. I want to do it one by one... Help :( thank you!!

      const [checked, setChecked] = React.useState(false);

      const obdngList = 
      [ 
        {"a": "test1", "b": "test2", "c": "test3"}
      , {"a": "test111", "b": "test222", "c": "test333"}
      ];


                      <FlatList
                        data={obdngList}
                        renderItem={({ item }) => (
                          <Checkbox.Item 
                            label={item.a}
                            value={item.b}
                            status={checked ? 'checked' : 'unchecked'} 
                            onPress={() => {
                              setChecked(!checked)
                            }}
                          />
                        )}
                      />