I am using Metabox to create two CPTs with front end submission for users. Now I don't want those CPTs entries to be visible in the Sitemap generated by Slim SEO. So I removed them from the sitemap using a snippet. They are not visible in /sitemap.xml but they are visible in /sitemap-post-type-[my-post-name].xml
In metabox CPT options I literally disabled everything: not public, disabled from search, not publicly quearyable not shown in REST, no archive, no query var... and the links in: /sitemap-post-type-[my-post-name].xml still exist.