Searching for YML/JSON Swagger/Open API File to SAP Graph Endpoints

Hi,

is it possible to get the Swagger/Open API File for the SAP Graph API?

On the API Buisness HUB Page I can download the API Specifiaction in JSON/YAML Format for any OPEN API (e.g. https://api.sap.com/api/ECPayrollTimeSheets/overview)

However, if I search for the same entity on the official SAP Graph Documentation (https://navigator.graph.sap/entities/sap.hcm.EmployeeTimeSheet) i can't find any possibility to load the API Specification in JSON/YAML Format.