defaultValue not working?

How can I set a default value in the picker? What I want is after the screen/component loads, there should be a value in the dropdown (without the user clicking the picker)

I have already tried setting a defaultValue props but it does not work.

const [defValue, setDefValue] = useState({ label: 'test', value: 'test'})

            <DropDownPicker
                listMode="SCROLLVIEW"
                scrollViewProps={{
                  nestedScrollEnabled: true,
                }}
                zIndex={3000}
                zIndexInverse={1000}
                style={styles.field}
                open={open2}
                value={value}
                items={leaveOptionDropDown}
                setOpen={setOpen2}
                setValue={setValue}
                defaultValue={defValue}
                onChangeValue={(value) => {
                  handleChange('type_of_leave')
                  setFieldValue('type_of_leave', value)
                }}
            />

I have also tried setting a selected value in the items but it also does not work.

        leaveOptionDropDown.push({
          key: item.id,
          label:item..first_name+" "+item.last_name,
          value:item.id,
          selected: {selected}
        })

[hossein-zare]

You must pass a value not an object.

const [items, setItems] = useState([
  {label: 'United States', value: 'US'},
  {label: 'Russia', value: 'RU'}
]);
const [value, setValue] = useState(null);

useEffect(() => {
  setValue('RU');
}, []);

OR

const [value, setValue] = useState('RU');

[Ashutosh-Tiwari]

How to achieve this default value behavior for class component?