Render Shortcodes in WPGraphQL Gutenberg Blocks

ShortcodeBlockModifier.php

<?php

namespace Harness\Gutenberg;

use WPGraphQLGutenberg\WPGraphQLGutenberg;
use WPGraphQL\Registry\TypeRegistry;
use Harness\Interfaces\Hookable;

class ShortcodeBlockModifier implements Hookable {
    public function register_hooks() {
        add_action( 'graphql_register_types', [ $this, 'add_fields'] );
    }

    public function add_fields() {
        $type = WPGraphQLGutenberg::format_graphql_block_type_name( 'core/shortcode' );

        register_graphql_field( $type, 'renderedShortcode', [
            'type'        => 'String',
            'description' => __( 'Rendered shortcode markup.', 'harness' ),
            'resolve'     => function( array $block ) : string {
                return do_shortcode( $block['originalContent'] );
            }
        ] );
    }
}