AMP HTML Sitemap is an all-in-one plugin for WordPress which generates a customizable list of all AMP post articles for better SEO/indexing purposes. The sitemap is added to your website by simply using the customizable shortcode.
AMP HTML sitemap is a type of list including names and links to your posts and pages in the front end of your website. The primary function is to present a good overview of your AMP ready content to your audience. Rather it is very useful because internal linking enables better indexation. The plugin is compatible with WordPress 4.5.3 or higher. The last update was about one month ago with almost 20+ active installation by WordPress user. For daily indexing, you can add URL of your sitemap page to the plugin. Alternatively, you can use Google XML sitemap for this purpose. You just need to copy and paste URL. For using AMP HTML Sitemap you just need to upload folder of AMP HTML Sitemap Plugin and place the given shortcode in pages or post, e.g., [amp-sitemap].
AMP HTML Sitemap displays the list that can be easily customized for SEO. . AMP does not need a specific HTML or XML if your content is marked correct; because search engine knows well where AMP content is located on your regular WordPress content pages.