How to add noindex tags to some special pages in bulk?

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention.

You can use this code to set those filtered URLs to noindex:

add_filter( 'rank_math/frontend/robots', function( $robots ) {
	$url = home_url( $_SERVER['REQUEST_URI'] );
	if (strpos($url,'?filter_color=') !== false || strpos($url,'?filter_brand=')) {
                $robots['index'] = 'noindex';
                $robots['follow'] = 'nofollow';
	        return $robots;
        }
	return $robots;
});

Here’s how you can add a filter/hook to your WordPress site:
https://rankmath.com/kb/wordpress-hooks-actions-filters/

Hope that helps.

Hello,

Let us know how it goes.

Meanwhile, please don’t hesitate to get in touch if you have any other questions.

Looking forward to helping you.

Thank you.