Siri Shortcut can fire up a Flow, but can the Flow communicate back to the Shortcut?

I’ve managed to make a Siri Shortcut that sends a link to the Homey and there the token (how is it called) is extracted via HTTP GET and runs that flow. Loosely based on this tutorial: [TUTORIAL] Using Siri/Shortcuts for activating flows (with pics!)
But would it be possible to send something back to the Shortcut on iPhone?

So I fire up a shortcut by asking Siri.
Homey got triggered by the HTTP GET token.
The flow runs, it is making a Boolean set to true.
It sends that state back to Siri.
It continues the shortcut based on the boolean.

But how to manage the send it back part?