Stephen AfamO

This plugin allows you to use any HTML or PHP file as the template for any page or post.
Simply upload the file and select it. 
You can upload custom js and css files into the media library and link to them from the HTML file.
Options:
<ul>
<li>Overwrite All: You overwrite the entire theme and use your custom file</li>
<li>Overwrite Content: Keeps the header, footer, sidebar, e.t.c. Simply overwrites the body of the page or post</li>
<li>Above Content: Your custom content is simply added to the top of the page content</li>
<li>Below Content: You custom content is placed just beneath the page content.</li>
</ul>
<h4>Adding support for custom post types</h4>
By default the pulugin works with pages and posts, however, go to the settings to enable it on any other registered post type.
use the <code>hppp_post_types</code> filter to add more post types.
Like this:
<pre><code> public function post_type_modify ($post_types) {
 $post_types[] = 'custom_post_type';
 return $post_types;
 }

 add_filter( 'hppp_post_types', 'post_type_modify' );
</code></pre>

Custom HTML/PHP Post Templates

I use this on a couple sites I own and it works wonderfully.
I hope you can find it useful. 

Works like a charm

Use your HTML or PHP files for any page or post.

onodev77

List Pages gives you three ways to display a list of WordPress pages wherever you need them:
<ul>
<li>Widget – add it to any sidebar or widget-ready area (Classic Widgets and the Block Widget Editor are both supported).</li>
<li>Block – add the “Pages List” block directly inside any post or page in the block editor.</li>
<li>Shortcode – drop <code>[onodev_pages_list]</code> into any post, page, or template that supports shortcodes.</li>
</ul>
All three share the same options, so you only have to learn them once.
Display modes
<ul>
<li>Latest pages – automatically show the most recently published pages.</li>
<li>Manual selection – pick exactly which pages to show, with a paginated picker.</li>
<li>Children of the current page – perfect for documentation sites, knowledge bases, or any site with a page hierarchy.</li>
<li>Siblings of the current page – show the other pages at the same level, useful for in-page navigation.</li>
</ul>
Display options
<ul>
<li>Optional featured image (thumbnail) next to each title.</li>
<li>Optional excerpt, with configurable word length.</li>
<li>Order by date, title, menu order, or random.</li>
<li>Exclude specific page IDs.</li>
<li>Highlight the page currently being viewed.</li>
<li>Works with custom post types, not only the default “Page” post type.</li>
</ul>
Built for performance
No external libraries, no build step, no tracking, no bloat. A handful of PHP files and one small CSS file you can fully override from your theme.

List Pages – Widget, Block & Shortcode


Unique plugin to display recent or custom pages in widget. 


Pages, not Posts

A flexible page list: widget, block, or shortcode. Latest, manual, child or sibling pages, thumbnails and excerpts included.

Custom HTML/PHP Post Templates vs List Pages – Widget, Block & Shortcode