iframe handover redirect

We have an application that opens an overlay that contains the iframe for esigning (this is all happens in React SPA app). From what I can tell the handOver url will only redirect within the iframe containing esign. Is there anyway to have this url redirect to a parent frame instead of within the iframe ? Right now we have no way to know what's happening inside the esign iframe in our application.

Our developers have a question around the specific details around how the redirect from Silanis to the handover URL is handled. Could someone shed some light onto what mechanism is used? We are embedding the signing experience in an iFrame and are trying to iron out some issues and the details around this could help us out. Thanks!