Convert multiple approvals on order items to single approvals for items of same order numbers

Dear team,

I appreciate your help thus far on the use of Move Order and Move Order Transact.

Now, I have an observation, I raised an order with multiple entries i.e I have a list of order items as below:

Header :Order No: 120198-001

Line1: Biro                   quantity: 1           etc (N.B account field same for all the enties)

Line2: APC Surge        quantity: 1

Line3: A4 paper            quantity: 1

Upon submission of the order, I discover that the status changes to pending approval as expected.

The approval then logs in and sees a list of items waiting for her approval.

She selects the first item and approves while the remaining 2 were still pending approval.