You recipe is lean for a cookie but nearer to a semi sweet biscuit. What equipment does your client have, rotary molders or rotary cutter…Does he have a tunnel oven.
I do find your recipe a bit dry but did not comment about it as I don’t know your flour quality.,if its lower in protein or not( suited for biscuits,) .
What is obvious is your lack of chemical leavening which can significantly improve the pore or crumb structure of your biscuit.
Further as you combined all the ingredients simultaneously it implies its a biscuit than a cookie.
Please take a second look at your recipe , try to check the facility of your client about the machine that eventually runs it during scale up then use it as as the idea to improve your biscuit…