Nick van de Veerdonk

An HTML sitemap is a list of names and links of your pages and posts in the front end of your website. It can be useful for users to get a good overview of the content you’re presenting. For bots it is equally useful since the internal links send them to the farest corners of your website, which could help indexation greatly.
Strictly taken AMP does not need a sitemap (HTML or XML) if the content is marked up correctly: engines know where AMP content is by this piece of code present in your regular pages:
<pre><code><link rel="amphtml" href="https://www.example.com/url/to/amp/document.html">
</code></pre>
That being said there could be several reasons to use an AMP HTML Sitemap:
<ol>
<li>
You want your AMP content to be indexed faster and more regulary. In case you don’t have much traffic, external links or good internal linking structure indexation could take a while. An HTML sitemap will improve your internal links and if you add the URL of the sitemap to your current XML sitemap plugin, search engines will gain information on the AMP content by automatic submission of your XML sitemap. (see ‘Addditonal tips’ under installation tab)
</li>
<li>
You have ‘stand alone’ AMP content. Seen as there are no links pointing to content that is only reachable by AMP (because they miss the link from the regular page and naturally don’t occur in menus) it can take a long time for them to be indexed.
</li>
<li>
You have an HTML sitemap for regular content and simply wish to add your AMP content to it
</li>
</ol>
And in that case, this lightweight plugin is for you.
This plugin will not be supported, I will however try to answer all question in the comment section of the <a href="https://jaaadesign.nl/en/blog/amp-sitemap/" rel="nofollow ugc">plugin website</a> and create a FAQ.
Matt Cutts on HTML and XML sitemaps 
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AMP HTML Sitemap

Only four stars so far, because although the description  says it does posts and pages, I only get posts.

This plugin worked well. After adding the shortcode to my existing sitemap page, there were new links appended with /amp to the AMP posts.  

Great idea for a plugin, and I just now submitted the sitemap page to "Fetch as Google" in the Search Console. I can't yet say if it will speed up Google's  discovery, but I do suspect it will.

***Update*** 
In 24 hours, AMP pages in Google's index went from "none found" for three domains, to well over 50%.  Clearly this plugins does what it's intended to do - helps Google get AMP pages indexed faster.

Worked Perfectly

The links have incorrect endings.
Should be:
site.url/stat-name.html

Actual result:
site.url/stat-name.htmlamp

The links have incorrect endings

Generates a customizable list of your AMP posts, pages and custom post types for SEO/indexing benefits, to be added to the content by shortcode.

weeblrpress

AMP pages are used by most search engines to show your website pages to mobile searchers. They are the first contact many users will have with your web site, and a large part of your search results will depend on how attractive and interactive your AMP pages are.
weeblrAMP goes well beyond standard AMP plugins. It lets you create a nearly complete AMP version of your site, as fully featured as the AMP specification allows: posts, pages, categories, tags and archives. Also built-in: ** comments (native and Disqus), Google Analytics, Google Tag Manager, Facebook Pixel, ads, schema.org, Yoast, Jetpack, Beaver Builder, Elementor or PolyLang integrations. Translated to French and Spanish.**.
The premium edition automatically converts Contact Forms 7, Gravity forms and WPForms forms, Mailchimp For WP, WooCommerce or Easy Digital Downloads and adds many other features.
weeblrAMP will operate out of the box with default settings and is highly customizable from WordPress admin.
Developers can override every bit of the AMP pages with templates overrides, as well as its 70+ filters and actions, fully documented on our site.
Want to see it in action on a site with WooCommerce, Gravity Forms or Contact Forms 7 (and more)? please visit our <a href="https://demo.weeblrpress.com/amp/" rel="nofollow ugc">demonstration site</a>.
Want to explore the admin and have your own site to test? just <a href="https://addendio.com/try-plugin/?slug=weeblramp" rel="nofollow ugc">click here to have Addendio.io create a free test instance for you!</a>.
<h3>After activation</h3>
<ol>
<li>AMP pages are available already by appending <code>/amp</code> to existing URLs of your site. Search engines cannot find them yet however, as you are running in Development mode by default.</li>
<li>Visit the <code>weeblrAMP</code> -> <code>Settings</code> page to <a href="https://www.weeblrpress.com/documentation/products.weeblramp/1/getting-started/index.html" rel="nofollow ugc">perform basic configuration</a>, then switch to Normal operation mode, where search engines and other applications can see your AMP pages and use them.</li>
</ol>

AMP on WordPress – weeblrAMP CE

Really good plugin to render AMP pages.

It's easier than all others AMP plugins I have tested.
It worth giving a try.

Good plugin

Testing it for some time and it gets better than better.
Lots of options and possibility.

Keep up the great job!

Promising and well developed

weeblrAMP provides advanced support for Accelerated Mobile Pages for WordPress: posts, pages, categories, tags and archives.

AMP HTML Sitemap vs AMP on WordPress – weeblrAMP CE