Cannot update Yoast SEO post meta to no index based on ACF field

Question

I am trying to update Yoast post meta to set no index based on an ACF field, but it is not working anymore. Setting an ACF field is way easier for clients than going to the Yoast SEO plugin settings on a post/page.

function px_lp_update_post_meta_based_on_acf_fields( $post_id ) {

if (get_post_meta($post_id, 'lp_hide', true) == 'false') {
delete_post_meta($post_id, '_yoast_wpseo_meta-robots-nofollow');
delete_post_meta($post_id, '_yoast_wpseo_meta-robots-noindex');
}

else {
update_post_meta($post_id, '_yoast_wpseo_meta-robots-nofollow', '1');
update_post_meta($post_id, '_yoast_wpseo_meta-robots-noindex', '1');
}

}
add_action('post_updated', 'px_lp_update_post_meta_based_on_acf_fields', 10);
add_action('save_post', 'px_lp_update_post_meta_based_on_acf_fields', 10);