Our sitemap is showing in Google's SERP. While it's only for very specific queries that don't seem to have much value (it's a healthcare website and when a doctor who isn't with us is search with the brand name so 'John Smith Brand,' it shows if there's a first or last name that matches the query), is there a way to not make the sitemap indexed so it's not showing in the SERP. I've seen the "x-robots-tag: noindex" as a possible option, but before taking any action wanted to see if this was still true and if it would work.