ATP don't show the pegging with the detailed constraints

Hi Experts,

ATP don't show the pegging with the detailed constraints in supply chain, for the SO lines which are already scheduled. This is when ATP is queries from the SO lines and not from MRP-ATP form.

MRP-ATP forms shows all level pegging, but the results are different as compared with SO line level ATP inquiry.

I understand that  this is the standard oracle behavior, as the already scheduled SO  lines would have supply orders against them.

But our Business  wants to know, how they can check for the constraints in detail for the already scheduled Sales order lines which have SSD greater than the Request dates.