How to expose custom fields of Quality Notifications in SAP S4HANA Cloud public edition?

Hello everyone, 

Maye I inquire if it is imaginable to exposure a CDS projection presumption arsenic an API?

My occupation is that the Quality Notification API successful SAP S4HANA Cloud Public Edition https://api.sap.com/api/CE_QUALITYNOTIFICATION_0001/overview / https://help.sap.com/docs/SAP_S4HANA_CLOUD/0629fd486efa4d339f8b10603b6f1e3f/454808498fc344a8a08b9125... does not let extensibility.

Thus, customized fields added to the Quality Notification (business context: Quality Management: Quality Info Record successful Procurement (QM_QUALITYINPROCUREMENT) tin not beryllium work by the Quality Notification API (and nary config is determination successful the "custom fields" app to alteration the customized tract for the Quality notification API):

On the different hand, CDS presumption "I_QUALITYINPROCUREMENTTP_2" allows to amusement the customized tract arsenic shown below: 

So I was reasoning of creating a work explanation and past an OData work binding for it, to beryllium capable to query the CDS presumption from a 3rd enactment strategy and from postman.

The work explanation is being created correctly: 

But nary work binding tin beryllium generated: 

Would this beryllium possible? Someone tin assistance suggest however to exposure the customized fields of prime notification level with an API truthful that a 3rd enactment strategy tin work the data?

By the way, EML coding allows to work the customized fields, but my occupation is that we request to work the prime notification customized fields with an API (???) from CPI successful a caller iFlow that needs to beryllium developed: 

Thank you