/**
* Sorts cart fees alphabetically.
*
* @see https://wpcodebook.com/woocommerce-sort-cart-fees-alphabetically/
* @see https://github.com/woocommerce/woocommerce/blob/8.0.2/plugins/woocommerce/includes/class-wc-cart-fees.php#L147
*
* @param int $res Sort order, -1 or 1.
* @param stdClass $a Fee object.
* @param stdClass $b Fee object.
*/
add_filter( 'woocommerce_sort_fees_callback', function ( $res, $a, $b ) {
return ( $a->name > $b->name ? 1 : -1 );
}, 10, 3 );The snippet will sort fees by title, ascending. To sort by title, descending:
return ( $a->name > $b->name ? -1 : 1 );
By default, in WooCommerce, fees are sorted by amount, descending.