Enabling Gutenberg for Custom Post Types

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Super quick tip here, but probably non-obvious.

If you want to be able to use WordPress’ Gutenberg editor with a Custom Post Type you’ll need to register the post type with REST API support.

<?php
register_post_type('my_post_type', [
    'label' => 'Things',
    'labels' => ['...'],

    'show_in_rest' => true, //required to enable Gutenberg editor
    
]);