Change order for Upsell & Related products sections on single product in WooCommerce

functions.php

<?php
/**
 * Change order for Upsell & Related products sections on single product
 */
function CUSTOM_change_order_upsell_related() {
	if ( is_product() ) {
		// Remove Upsell section
		remove_action( 'woocommerce_after_single_product_summary','woocommerce_upsell_display', 15 );
		
    		// Remove Related products section
		remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );
    
    		// Add the new order
		add_action( 'woocommerce_after_main_content', 'CUSTOM_upsell_related_display', 25 );
	}
}

/**
 * Display content for new order
 */
function CUSTOM_upsell_related_display() {
	global $product;

	$args_related = array(
		'posts_per_page' => 3, // Number of related products
	);
  
  $args_upsell = array(
		'posts_per_page' => 2, // Number of upsell items
	);

	$related = $product->get_related();
	if ( ! empty( $related ) && (count( $related ) > 0) ) { ?>
		<div class="woocommerce-related-products">
      <div class="container">
        <div class="row">
          <?php echo woocommerce_related_products( $args_related ); ?>
		    </div>
      </div>
    </div>
	<?php
  }

	$upsells = $product->get_upsells();
	if ( ! empty( $upsells ) && (count( $upsells ) > 0) ) { ?>
	  <div class="woocommerce-upsells-products">
      <div class="container">
        <div class="row">
		      <?php echo woocommerce_upsell_display( $args_upsell ); ?>
		    </div>
      </div>
    </div>
  <?php
	}
}
?>

hooks.php

<?php
// Hook
add_action( 'template_redirect', 'CUSTOM_change_order_upsell_related' );
?>