How do I exclude a category from the XML sitemap in Wordpress

Wordpress / Yoast.  i have a lot of Draft Pages in my wordpress CMS.  Yoast will not put them in the sitemap if I mark them to be excluded, but there are too many to go through.  They are all in one category.  I want Yoast to not place a specific category (or taxonomy, which ever is easier) in my XML sitemap.  The reason is, Google will index Draft and private pages and I don't want that because they will come up 404.

How do I exclude a category from the XML sitemap in Wordpress

I found this but I dont think it is what I want

/* Noindex all posts in a category */
add_filter("wpseo_robots", function($robots) {
  if (is_single() && in_category(array(100))) {
    return "noindex,follow";
  }
  return $robots;
});

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