functions.php

<?php

if( defined('YITH_YWRAQ_PREMIUM') ){

	add_action('wp_footer','raq_script',9999);

	function raq_script() { ?>
		<script>
		
		jQuery(document).ready(function($) {
			$(document).on( 'touchstart', '#yith-ywraq-default-form .select2', function(){
				var $t = $(this);
			   $t.click();
			});	
		});
		</script>
		<?php 	
			
		}
}