We're beta testing the order create api endpoint on our enterprise Shopify plan right now, enabling us to hackily import manual phone/wholesale orders via an internal app we developed. It's definitely a step in the right direction, but Shopify really needs to prioritize a backend order creation tool.
Every e-commerce product across-the-board has this feature, and it's disappointing to see a platform as well-crafted and mature as Shopify still without many of the essentials.
We can now officially create orders via a POS system, but still can't create an order on our own website without registering as a customer or jumping through 3rd party shipping/tax/payment APIs.
Order creation will be open soon.