If your implementation cannot find a workaround and needs to implement prior to the official implementation, you have the option of exposing the Entity in a custom API.

Entities that are not currently exposed, can be exposed in a custom endpoint and created using the Rest Endpoint Generator (REG). Of course, when support is implemented, the API usage should be converted to the official API's.

REG is fairly easy to use, most of the structure is generated. The code is generated with markers of where the developer needs to add specifics. The documentation is here, login required

The new API will need to be registered with GW Cloud in order to be accessed. Documentation for registering your endpoint is here, login required