Toggle button

Hi,

You can add this code to the file functions.php in the child theme folder or use the plugin Code Snippets to implement.

add_action( 'wp_footer', function() {
	?>
	<script type="text/javascript">
		jQuery(document).ready(function($) {
			$('ul.nav-menu > li.menu-item-has-children > a').on('click', function() {
				$(this).closest('.menu-item').find('.nav-toggle-icon').trigger('click');
			});
		});
	</script>
	<?php
} );

it will help you open the sub-menu when clicking to the menu item, not only the arrow down.

Regards.