Tracy Rotton

taupecatstudios

Custom taxonomies that were developed prior to the release of WordPress 5.0 (the Gutenberg release) may not be compatible with the WordPress block editor.
Custom taxonomies require that the “show_in_rest” property be set to “true” in order to work with the block editor. “show_in_rest” was added with WordPress 4.7 and the integration of the WordPress JSON REST API. Sites using custom taxonomies that were created prior to this likely do not have this property set. Additionally, the default value for “show_in_rest” is “false” (this is poorly documented), ergo older custom taxonomies will not appear in the WordPress block editor interface.
This plugin will take any custom taxonomy where the “show_in_rest” feature is set to “false” and change it to “true”. It will not add any additional REST properties, such as “rest_base” or “rest_controller_class”. If you need those properties set for any reason, you will need to update your custom taxonomy where it is being registered.

Custom Taxonomies for Blocks

WordPress plugin to convert older custom taxonomies so they can be used in the WordPress blocks interface (a.k.a. Gutenberg).

postpostmodern

pinecone-dot-website

Automatically display custom taxonomy information in wp-admin/edit.php 
– requires PHP >= 7.0, WP >= 4.8

Taxonomy Taxi

Automatically display custom taxonomy information in wp-admin/edit.php

Custom Taxonomies for Blocks vs Taxonomy Taxi