function provexa_assets() {
    wp_enqueue_style('theme-style', get_stylesheet_uri());
}
add_action('wp_enqueue_scripts', 'provexa_assets');<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://provexa.blackmagazine.de/wp-sitemap.xsl" ?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url><loc>https://provexa.blackmagazine.de/category/uncategorized/</loc></url></urlset>