Register Connection to Attached Media

add_action( 'graphql_register_types', function() {
	register_graphql_connection([
		'fromType' => 'ContentNode',
		'toType' => 'MediaItem',
		'fromFieldName' => 'attachedMedia',
		'connectionArgs' => \WPGraphQL\Connection\PostObjects::get_connection_args(),
		'resolve' => function( \WPGraphQL\Model\Post $source, $args, $context, $info ) {
			$resolver = new \WPGraphQL\Data\Connection\PostObjectConnectionResolver( $source, $args, $context, $info, 'attachment' );
			$resolver->set_query_arg( 'post_parent', $source->ID );
			return $resolver->get_connection();
		}
	]);
} );