I suggest using a React key to "reset" the uncontrolled input. When the React key changes React will throw away the old version and mount a new "instance".

See fully uncontrolled component with a key for example and deeper explanation.

const [key, setKey] = useState(false);

...

const handleClearfilter = () =>{
  setStartDate("");
  setEndDate("");
  setKey(k => !k); // toggle React key value
}

<DateRangePickerComponent
  key={key} // <-- attach React key
  placeholder='Select a range'
  change={onChangedate} 
  style={{paddingTop: 10, fontSize: 16}}
/>

If you want to control the component, you have to feed in the values yourself. The docs show that you require two date values since it is a data range input.

  const [startdate, setStartDate] = useState();
  const [endDate, setEndDate] = useState();


  const onChangedate = (e) => {
      let startDate = convertDate(e.startDate);
      let endDate = convertDate(e.endDate);
      setStartDate(startDate);
      setEndDate(endDate);
  }; 
  const handleClearfilter = () =>{
    setStartDate("");
    setEndDate("");
  }

  <DateRangePickerComponent   placeholder='Select a range' change={onChangedate}   startDate={startDate} endDate={endDate}
              style={{paddingTop: 10, fontSize: 16}}
              />


 <Button 
    onClick={handleClearfilter}
  >
  Clear All
  </Button>