functions.php

/**
 * Сортировка атрибутов в админке по алфавиту
 *
 * @param $attr
 *
 * @return array
 *
 * @testedwith    WooCommerce 6.0
 * @author        Artem Abramovich
 */
function art_woocommerce_sorting_attributes_list( $attr ) {

	return wp_list_sort( $attr, 'attribute_label', 'ASC' );
}


add_filter( 'woocommerce_attribute_taxonomies', 'art_woocommerce_sorting_attributes_list' );

I put this in my child theme functions.php and there was no change to the Products > Attribute page.

It should work. I checked on several sites, the snippet works. But sometimes it may not work, I don't know why, I'll have time to figure it out

How would you get the attribute slug from a WP_Taxonomy instance?

Why does WooCommerce use WP_Taxonomy instances anyway? I thought they had their own WC_Product_Attribute class.

How would you get the attribute slug from a WP_Taxonomy instance?

Why does WooCommerce use WP_Taxonomy instances anyway? I thought they had their own WC_Product_Attribute class.

No way. This is not required. I'm just sorting through what's already there. The woocommerce_attribute_taxonomies filter is triggered after all attributes are received. You don't need to receive anything