Noindex Product Search Pages

add_filter( 'aioseo_robots_meta', 'aioseo_filter_robots_meta' );

function aioseo_filter_robots_meta( $attributes ) {

	if ( is_search() && 'product' === get_query_var('post_type') ) {

		$attributes['index'] = "noindex";

	};

	return $attributes;

}