I have a test store and see no way to display SKUs on the site as they noted as being are for "inventory and invoices".
What I would do is simply add the SKU at the end of the item description. Since you use bulleted lists, make that the last bullet.
Are there any plans to add a setting to allow us to display the SKU if desired? It would be helpful to display so that when talking with customers we are clear what product item they are referring to. Seems this is a pretty standard feature on other online stores.
Sorry for the inconvenience. Most consumers may not be comfortable dealing with SKU and always refer to products by the title. This was rationale for us not listing the SKU to your consumers, but you do bring up a right use case for to show SKU to consumers. We'll include this in our backlog and try to address it soon. Meanwhile, you could include SKU at the end of product title or in the description, so your customers can refer to them.
Product Manager, Online Stores