We see that the e-landing-page-sitemap.xml appears, but it’s empty. Can you send us more details about what plugin or theme is creating this post type and an example URL of a page that should appear in this sitemap?

If you don’t want to show any e-landing-pages in the sitemaps, you can remove this sitemap by going to SEO > Search Appearance > Post Types and setting “Show in Search Results” for e-landing pages to “No”.