WooCommerce Orders - Get total order weight in WP All Export

wc-get-total-order-weight.php

<?php
function my_get_total_order_weight( $order_id ) {
	$order        = wc_get_order( $order_id );
	$order_items  = $order->get_items();
	$total_qty    = 0;
        $total_weight = 0;
    
	foreach ( $order_items as $item_id => $product_item ) {
		$product         = $product_item->get_product();
		if ( ! $product ) continue;
                $product_weight  = $product->get_weight();        
		$quantity        = $product_item->get_quantity();
                $total_qty      += $quantity;
                $total_weight   += floatval( $product_weight * $quantity );
	}
	return $total_weight;
}

Check if the product exists, because it's possible the product was already deleted, but its still in an old order.

Good call, I added a check.