You want to control the visibility of users on Data Workbench Objects through Business Roles based on business needs, creating custom Data Workbench Objects with limited fields and providing access to the users for data export and update.
SAP Cloud for Customer
This functionality is qualified as a new requirement.
It is possible to post this request to Continuous Customer Influence portal (available at https://influence.sap.com/SAPCloudforCustomer), which is the proper channel for such requests. In the Continuous Customer Influence portal, other customers and partners can review and appraise your request and this repository is frequently checked by SAP Development Team and SAP Product Managers, when deciding which functionalities to add or enhance for future product releases.
The availability and changeability of objects in the Data Workbench is explained in the Knowledge Base Article 2745040 - Data Workbench Restrictions not Matching User Access Rights.
Check the Knowledge Base Article 2531827 - Functionality Currently not Available for more information about new requirements.
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