Custom attribute searchable in Add Product, admin order entry MAG 2

In Magento 2 Admin, order entry, add product, how can I have the search, search an attribute that is not listed? Such as ID or in my case I have Product_ID, if the item has a bar code I put the number in there, if not I use the Unique ID to make small QR codes, then put the ID in there. How can I have that searched when I am in the backend entering an order? Any help would be appreciated. Thank you.