Hi,
Please check any MRP group assigned to these materials, if yes then please check the settings defined for the creation indicator in OPPR. Create MRP list = 1.
OSS note 23922 which explain the difference creation indicator in MD01/MDBT and MD02
and Note 211224 - MRP: MRP list is not created.
Reason-
The creation indicator is not set in the MRP group for this material (Transaction OPPR)
Regards,
R.Brahmankar