“primary-category”

WordPress plugin that allows you to specify a Primary Term for a Taxonomy.

WordPress plugin to make Yoast Primary Category first in REST JSON feed's categories array

Allows manual selection of a primary category to use in post permalinks (replaces %category%).

WP Prime Cat; Simple and lightweight WordPress plugin for managing primary categories.

WordPress Primary Category Marking for Gutenberg Editor

WordPress plugin – primární kategorie pro drobečkovou navigaci WooCommerce

Allows you to choose primary taxonomy for posts and custom post types.

Content Primary Category is a simple plugin that allows publishers to specify a Primary Category to a post or custom content type.

Add Primary Category to Posts and Custom Post Types. This plugin allows to select a primary category for posts and custom post types.

SSWS Yoast Primary Category to WP REST API

Ability to query for posts (and custom post types) based on their primary categories.