// Fix robots.txt
function my_fix_robots_txt($output, $public) {
    $output = str_replace("User-agent: Applebot\nDisallow: /\n\n", "", $output);
    $output = str_replace("User-agent: Applebot\nDisallow: /\n", "", $output);
    if (strpos($output, "Sitemap:") === false) {
        $output .= "\nSitemap: https://www.botongpack.com/sitemap.xml\n";
    }
    return $output;
}
add_filter("robots_txt", "my_fix_robots_txt", 999, 2);<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="sitemap.xsl"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
	<sitemap>
		<loc>https://www.botongpack.com/sitemap_addl.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://www.botongpack.com/sitemap_post.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://www.botongpack.com/sitemap_page.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://www.botongpack.com/sitemap_news.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://www.botongpack.com/sitemap_category.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://www.botongpack.com/sitemap_post_tag.xml</loc>
	</sitemap>
</sitemapindex>