FedEx - Change product name and description while label printing.

functions.php

add_filter('wf_fedex_request','wf_fedex_label_custom_product_name_request_callback', 10, 2 );
function wf_fedex_label_custom_product_name_request_callback($request, $order){
    $product_name = 'Book'; //Type here a product name  it'll come as name of all products, Don't leave this blank or white space
    $product_description = 'Book'; //Description, This will come for all products, Don't leave this blank or white space
    
    $commodities = isset( $request['RequestedShipment']['CustomsClearanceDetail']['Commodities'] ) ? $request['RequestedShipment']['CustomsClearanceDetail']['Commodities'] : '';
    if($commodities != '' ){
        foreach ($commodities as $key => $commodity) {
            $request['RequestedShipment']['CustomsClearanceDetail']['Commodities'][$key]['Name'] = sanitize_title( $product_name );
            $request['RequestedShipment']['CustomsClearanceDetail']['Commodities'][$key]['Description'] = sanitize_title( $product_description );
        }
    }
    return $request;
}