As of August 16, Markets Pro now supports orders with a mix of digital and physical goods placed from checkout. Previously, digital goods were restricted by Markets Pro and could not be sold to customers internationally.
Orders placed at checkout with a mix of physical and digital goods will be managed by Markets Pro. For checkouts where the cart is solely comprised of digital goods, merchants will be the merchant of record and the order does not qualify as a Markets Pro order.
Note: Markets Pro doesn't support digital goods placed through draft orders yet. To create draft orders with a mix of physical and digital goods, you must send invoice to collect payment at checkout.
Learn more about digital goods in the Shopify Help Docs.