WooCommerce: Display upsells instead of related products

gistfile1.php

<?php
// @file: content-single-product.php

    /*
     * Display upsells if any
     * - removes duplicated product information
     */
    global $product;
    $upsells = $product->get_upsells();
    
    /**
     * woocommerce_after_single_product_summary hook
     *
     * @hooked woocommerce_output_product_data_tabs - 10
     * @hooked woocommerce_output_related_products - 20
     */
    if (empty($upsells))
    {
        remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_product_data_tabs', 10 );
    }
    else
    {
        remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_product_data_tabs', 10 );
        remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );
    }
    do_action( 'woocommerce_after_single_product_summary' );