I have been able to customize the order confirmation email twig file for a client to some degree, however when it comes to adding the SKU for each item ordered I cannot find a way to have it populate. I have tried to insert the commerce checkout order summary block that displays each product variation's sku, it did not populate in the email. I have also looked at the order item table which does include the SKU for the items ordered so I cannot pull from there.
Any advice on how to pull the SKU's into the order confirmation email twig file?