thevittfile

The plugin looks up the sub-attributes in your product, then for each value it looks up its parent and adds the parent attribute and the parent value in the product. 
When using a filter with the main attribute on the store page, all the products that have that main attribute are returned, which are the same products that contain the associated sub-attributes.
Important: 
You can’t create multiple hierarchy levels, just one. 
Two diferent attributes cannot contain the same sub-attribute.
<h3>Documentation</h3>
<a href="https://github.com/vittfiles/vitt-attribute-hierarchy" rel="nofollow ugc">vitt attribute hierarcht for woocommerce</a>

Vitt Attribute Hierarchy for WooCommerce

This plugin works simulating a hierarchy for attributes and subattributes.

Ciprian

Patrick Lumumba

WP Corner

Bulk Variations for WooCommerce is a powerful WordPress plugin that simplifies the process of creating and managing product variations in WooCommerce. It allows you to add a new variation attribute to all your existing products with just a few clicks, saving you a significant amount of time and effort.
Additionally, the plugin offers a global price adjustment feature, enabling you to increase or decrease the prices of the newly created variations with a percentage value.
<h4>Key Features</h4>
<ul>
<li>Bulk Variation Creation: Create a new variation attribute for all existing WooCommerce products simultaneously. This feature eliminates the need to manually add variations for each product, streamlining the process and saving you valuable time.</li>
<li>Global Price Adjustment: Easily adjust the prices of the newly created variations by specifying a percentage value. You can either increase or decrease the prices across all variations, providing flexibility in your pricing strategy.</li>
<li>Landing Page Integration: The plugin includes a shortcode <code>[variations attribute="your_attribute"]</code> that generates a landing page displaying all the available variation terms (e.g., shows, exhibitions) as a grid. Customers can easily navigate and select their desired variation.</li>
<li>Automatic Attribute Creation: If the specified attribute doesn’t exist in your WooCommerce installation, the plugin will automatically create it, ensuring a seamless integration with your existing product catalog.</li>
<li>User-Friendly Admin Interface: The plugin provides a clean and intuitive admin interface, allowing you to configure the variation attribute name, variation term name, and pricing adjustment percentage with ease.</li>
</ul>
<a href="https://wpcorner.co/woocommerce-bulk-variations-with-global-price-adjustments/" rel="nofollow ugc">Find out more here.</a>

Bulk Variations for WooCommerce

WooCommerce bulk variations with global price adjustments

Vitt Attribute Hierarchy for WooCommerce vs Bulk Variations for WooCommerce