There is at least 2 ways to get custom order item meta data from a defined meta key:
1) Since WooCommerce 3 – Using WC_Data
method get_meta()
2) The older way – Using wc_get_order_item_meta()
WooCommerce function
So your hooked function bs_order_lead_time_data()
code will be:
add_action( 'woocommerce_my_account_my_orders_column_order-lead-time', 'bs_order_lead_time_data' );
function bs_order_lead_time_data( $order ) {
foreach ( $order->get_items('shipping') as $item_id => $item ) {
// Using WC_Data method get_meta() since WooCommerce 3
echo $item->get_meta('Lead Time');
// Or the older way (using always the item Id)
// echo wc_get_order_item_meta( $item_id , 'Lead Time', true );
}
}
Code goes in functions.php file of your active child theme (or active theme). It should better work.