Custom Post Type Pages Not Showing in XML Sitemap

Hey, I have installed the plugin and generated a XML sitemap with the plugin.

However, the posts/pages in my Custom Post Types are not displaying in the XML sitemap.

I have checked them to display in the settings.

The custom post type (CPT) is showing in the sitemap but when I click on it, it does not display a list of posts within that CPT.

Any help appreciated.