on the order status page (order confirmation page) I want to include a barcode and SKU, How can I do that?
Unfortunately this isn't possible within the Shopify admin Order view. You are not able to edit this view.
If you are looking for an easier way to fulfil your orders you might want to test our app EasyScan.
Within EasyScan you can fulfil your orders, create orders, update and check your inventory all using a barcode scanner or mobile device.
Please get in touch if you would like any more assistance here.