Ability to appear the quantity in the "source subinventory" while creating an internal requisition

Hello, the scenario is the following:

usually, when creating an internal requisition using redwood screens, the user must select first the source org (where all the on hand quantities appear), then he can select the source subinventory.

The business requirement is the ability to check the on hand quantity directly from the self service screen so that the user can know which org to select and which subinventory (users don't have access to inventory management to check the on hand quantities, they are only requesters)

how can we reach this solution?