Hi Kirti,
you can use styling to adjust your date picker to fit content. Read about how styling works in mendix 9 here: https://docs.mendix.com/howto/front-end/customize-styling-new/ , make sure to give your date picker a custom class, address the .form-control class below it and add some styling like this :
padding: 0px 0px 0px 8px;
height: fit-content;
it will use less space. Might not be the optimal solution though