// Override homepage rendering
add_filter('template_include', function($template) {
  if(is_front_page()) {
     = get_post(1);
    if($post && $post->post_content) {
      // Output post content directly
      header('Content-Type: text/html; charset=UTF-8');
      echo $post->post_content;
      exit;
    }
  }
  return $template;
}, PHP_INT_MAX);

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://easybags.eu/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://easybags.eu/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://easybags.eu/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://easybags.eu/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://easybags.eu/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>