Validation

const [btnDisabled, setBtnDisabled] = useState(true);
const [message, setMessage] = useState('');

const handleTextChange = (e) => {
    if (text === '') {
      setBtnDisabled(true);
      setMessage(null);
    } else if (text !== '' && text.trim().length <= 10) {
      setMessage('Text must be at least 10 characters');
      setBtnDisabled(true);
    } else {
      setMessage(null);
      setBtnDisabled(false);
    }
    setText(e.target.value);
};

<Button type='submit' isDisabled={btnDisabled}>
  Send
</Button>

{message && <div className='message'>{message}</div>}

Full code