After doing a bit more research, I came across @amiddles response here: https://community.shopify.com/c/payments-shipping-and/how-do-you-handle-missing-sku-numbers/m-p/1801176/highlight/true#M65860@amiddles suggests to make up your own SKU and provid...

In my case the SKU field is required.Any suggestions as to what to do when I don't have an SKU?I am using the product as a digital service not a physical product.