它不能自动显示的原因是它需要启用REST才能显示。默认情况下，show_in_rest 注册分类法和帖子类型时设置为false。当前有一个Trac Ticket #42785 打开以更改此默认功能。

因此，简而言之，在使用块编辑器注册分类法时，您需要明确表示：\'show_in_rest\' => true

function all_about() {
    register_taxonomy( \'all_about\', 
        array(\'post\'), /* if you change the name of register_post_type( \'custom_type\', then you have to change this */
        array(
            \'hierarchical\' => false,    /* if this is false, it acts like tags */                
            \'labels\' => array(
                \'name\' => \'Categorization\', /* name of the custom taxonomy */
                \'singular_name\' => \'Name\', /* single taxonomy name */
                \'search_items\' => \' Search\', /* search title for taxomony */
                \'all_items\' => \'All items\', /* all title for taxonomies */
                \'parent_item\' => \'Parent item\', /* parent title for taxonomy */
                \'parent_item_colon\' => \'Parent item colon:\', /* parent taxonomy title */
                \'edit_item\' => \'Edit\', /* edit custom taxonomy title */
                \'update_item\' => \'Update\', /* update title for taxonomy */
                \'add_new_item\' => \'Add new\', /* add new title for taxonomy */
                \'new_item_name\' => \'New title\' /* name title for taxonomy */
            ),
            \'show_ui\' => true,
            \'query_var\' => true,
            \'rewrite\' => array( \'slug\' => \'all-about\', \'with_front\' => false ),
            \'show_in_nav_menus\' => true,
            \'show_tagcloud\' => true,
            \'show_in_quick_edit\' => true,
            \'show_in_rest\' => true,
        )
    );
}
add_action( \'init\', \'all_about\' );