/**
 * Kalium WordPress Theme
 *
 * @author Laborator
 * @link   https://kaliumtheme.com
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Direct access not allowed.
}

/**
 * After theme setup hooks.
 */
function kalium_child_after_setup_theme() {

	// Load translations for child theme
	load_child_theme_textdomain( 'kalium-child', get_stylesheet_directory() . '/languages' );
}

add_action( 'after_setup_theme', 'kalium_child_after_setup_theme' );

/**
 * This will enqueue style.css of child theme.
 */
function kalium_child_wp_enqueue_scripts() {
	wp_enqueue_style( 'kalium-child', get_stylesheet_directory_uri() . '/style.css' );
}

add_action( 'wp_enqueue_scripts', 'kalium_child_wp_enqueue_scripts', 110 );
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://annemelan.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://annemelan.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://annemelan.com/wp-sitemap-posts-portfolio-1.xml</loc></sitemap><sitemap><loc>https://annemelan.com/wp-sitemap-taxonomies-portfolio_category-1.xml</loc></sitemap></sitemapindex>