Create guest review with API

We have a use case of a large number of requests from users outside Wrike who create new projects via request forms.

On a trigger event, like a status change, we want to attach a file (working OK with the API so far) and then initiate a guest review to the email address of the original requestor. The API allows regular approvals, but not guest reviews.

What are the chances of adding the guest review functionality to the API?

This would unlike a significant productivity improvement for us.