Lovro Hrust

Plugin to support navigation by pages – similar to built in function the_posts_navigation() for posts. 
Pages in navigation are filtered by provided menu (Primary menu by default) and sorted in the same order as in menu. 
By default, main menu is used, but different menu could be used by calling function for displaying with different menu as parameter.
<h3>Disclaimer!</h3>
This plugin works only with classic themes. With FSE themes it will not work, since it depends on classic menus.
<h3>Usage</h3>
<h4>Basic</h4>
Just install and call <code>the_pages_navigation()</code> in your php template. There is also a <code>get_the_pages_navigation()</code> function which returns string with same content. 
Arguments to these functions could be supplied, all optional. 
* $menu – a menu ID, slug, name, or object (WP_Term) for which to show pages 
* $start_position – start position from which position in menu to start navigation 
? $end_position – to which position in menu to show navigation
<h4>Advanced</h4>
There are filters that can help to customize plugin output.
Change menu filter
<pre><code>apply_filters('page_nav_menu', $default_menu)
</code></pre>
Filters menu used for navigation.
<ul>
<li>$default_menu – a menu ID, slug, name, or object (WP_Term)</li>
</ul>
Arrow filters
<pre><code>apply_filters( 'page_nav_left_arrow', $HTML )
apply_filters( 'page_nav_right_arrow', $HTML )
</code></pre>
Filters arrow output.
<ul>
<li>$HTML – HTML of arrow, coded as SVG, img or something else.</li>
</ul>
Filter output
<pre><code>apply_filters( 'arrow_wrapper', $HTML_output, $left, $enabled, $output_image, $output_link, $output_div, $output_text )
</code></pre>
Filters whole HTML output.
<ul>
<li>$HTML_output – as the name says</li>
<li>$left – output is for left side (previous)</li>
<li>$enabled – navigation on that side is enabled</li>
<li>$output_image – html of arrow image</li>
<li>$output_link – URL of link to which arrow leads</li>
<li>$output_div – wrapper of text besides arrow</li>
<li>$output_text – text besides arrow</li>
</ul>
<h4>Examples of filtering</h4>
<pre><code>add_filter( 'page_nav_left_arrow', function() {
 return '<svg width="53" height="32" viewBox="0 0 53 32" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M51.77 15.994H1M16.622 31L1 15.998 16.622 1v30z" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
} );
</code></pre>

Page navigation by menu

Create navigation to next/previous pages similar to navigation for posts. Previous and next pages are determined from menu.

starblank

This free plugin shows next and previous product in single product view in same category.
Installation
Simply upload the .zip file into wordpress, then activate the plugin. A new submenu called Next/Previous Product will on Woocommerce Options left bar. 
This plugin requires Woocommerce in order to run. 
Has been tested with the new Storefront Woocommerce theme and is fully compatible with DIVI framework.
How to use
–Free Version allows: 
Show the previous and next product on the single product view of your store, from the same category, on the top the page.
—<a href="http://starblank.com/en/next-previous-products-for-woocommerce-premium/" rel="nofollow ugc">Premium Version allows:</a> 
-You can choose the location of the next /previos product links: 
 * Over the product 
 * At the bottom of the page 
 * Over the product description 
 * Below product description 
 * Floating in both sides of the screen
-Choose what product will be seen: 
 * Show only products from same subcategory 
 * From same category 
 * Show random products
<ul>
<li>
Show the image and/or the title of the product, all fully customizable in color and size
</li>
<li>
Allows you to use custom arrows instead of default ones
</li>
<li>
and much more!
</li>
</ul>
<a href="http://starblank.com/en/next-previous-products-for-woocommerce-premium/" rel="nofollow ugc">You can get the premium version here</a>
Have fun!

Next / Previous Product for Woocommerce FREE version

This free plugin shows next and previous product in single product view in same category. Installation Simply upload the .

Page navigation by menu vs Next / Previous Product for Woocommerce FREE version