Actually never mind that other ticket ( as we talk about other things as well )

try to add this into your child theme’s functions.php file

function v_woo_related_slider() { 
  if (is_product()) {?>
	<script>
	jQuery(document).ready(function($) {
	$("#woorelatedproducts").data('owlCarousel').destroy();
  	var owl = $("#woorelatedproducts");
	  owl.owlCarousel({
	      items : 4,
	      itemsDesktop : [1000,3],
	      itemsDesktopSmall : [900,3],
	      itemsTablet: [600,2],
	      autoPlay: 3500,
	      itemsMobile : false,
	  });
	  });
	</script> <?php 
	}
}
add_action( 'wp_footer', 'v_woo_related_slider' );

Of course, you can alter the items to match your needs.