generateStream chunks on front end from Firebase functions

[handihow]

Is your report related to a problem? Please describe.
Not clear how to consume the stream content in the front end application (Angular + Angular Material)

Is your report related to a suggestion/improvement? Please describe.
My app is built completely in the Google ecosystem using Firebase on the backend en Angular with AM on the front end. I would like to send the flows to Firebase functions and be able to also receive chunks on the front end. However, it is not clear how to do that. Currently I am writing updates to the Firebase Firestore database and keep a subscription to changes on the front end. This works fine, but only if I don't update on too many chunks. However this leads to additional reads and writes that seem unnecessary. Ideally I would like to receive chunks from the flow and then only save the final result.

Additional context
Add any other context or screenshots about the request here.