Trying to add the order subtotal in woocommerce my-account/orders table but I can't seem to get it to display. Currently it adds the column and the label but its not displaying the orders sub total. I am currently using the code below : 

```
add_filter( 'woocommerce_account_orders_columns', 
'add_account_orders_column', 10, 1 );
function add_account_orders_column( $columns ){
$columns['item_subtotal_tax_excl'] = __( 'Sub-total', 'woocommerce' );

return $columns;
}

add_action( 'woocommerce_my_account_my_orders_column_custom-column', 
'add_account_orders_column_rows' );
function add_account_orders_column_rows( $order ) {
// Example with a custom field
if ( $value = $order->get_meta( 'item_subtotal_tax_excl' ) ) {
    echo esc_html( $value );
}
}

```