Unable to create a businessProcessApprovalDelegationRule via HCM REST API

We're trying to view and create a BPM worklist approval delegation rule (aka Vacation rule) via a REST API call. I've been looking at the following endpoint in the HCM REST API: , and I'm able to successfully create a vacation rule for a specific category of HCM tasks, such as "GlobalAbsenceApprovals"; however, we are looking to set the generic "Vacation Period" rule which delegates all automatically assigned tasks during a vacation date range. When this type of rule is created in the BPM worklist area, the REST API endpoints DO return some of the rule details so I can see in the API response that the rule exists; however, I cannot see the data range that was selected for the rule in the API response & nor can I update the