FacetWP – Hierarchy Select

Description
FacetWP – Hierarchy Select is a plugin for WordPress that integrates with FacetWP, a popular faceted search plugin, to allow users to easily filter content by hierarchy.
Features:

Hierarchical Taxonomy Filtering
Multi-Level Hierarchy Support
Hierarchy-Based Sorting
Hierarchy Dropdown Display
Hierarchy Checkbox Display
Hierarchy Radio Button Display
Hierarchy Select2 Display
Hierarchy Counts
Hierarchy-Based Facet Logic
Custom Hierarchy CSS Styling
Hierarchy Analytics & Reporting
User-Friendly Hierarchy Management
Responsive Hierarchy Display
Hierarchy-Based Pagination
Multi-Language Hierarchy Support.

Note: These are just the generic features that a FacetWP – Hierarchy Select plugin might have, the exact features of the plugin will depend on the specific implementation.