Data not getting retrieved for item availability by GOP in Sales Order

Summary:

We are testing Back-to-Back Make Sales Order for a customer demo, but the Data is not getting retrieved for checking item availability in the Sales Order.

Following are the setups we have done for enabling B2B Make:

1 Enabled Items for MSP Planning, B2B and Calculate ATP as Yes

2 Created Global (Transfer From) & Local Souring Rule (Make At) for the Organization used for shipment.

3 Created ATP Rule with "Item and Organization" as the Granularity level

4 Assigned the Sourcing rule in the assignment set for Item and Organization

We ran the collection Job process in targeted Mode but when we search for the collected item in the Plan Inputs tab, the Calculate ATP shows as NO which should not happen.