Hello
Sales orders and delivery requirements are generally read from table VBBE, so please check if there is a record on this table for this sales order.
If there is no record on VBBE, the sales order will not be displayed on MD04 or considered by MRP. If this is the case, there some possibilities:
1 - A database inconsistency, which can be corrected by report SDRQCR21;
2 - The sales order is not relevant to MRP. In this case, you should check the sales order requirement type/class customizing;
3 - BAdI MD_CHANGE_MRP_DATA is implemented and there is a custom logic to exclude sales orders from MRP;
See the document MD04: Problems with sales orders for details.
BR
Caetano