"repeat with" using the http flow function

Hi there!
I’m using the HTTP Request flow function rather than Appgyver’s REST API because I have a request body in the GET request. Appgyver’s REST API integration doesn’t allow GET requests to have request bodies:

My question is,
How do I get a collection with 10 documents from my firestore database and display it using the repeat with property in a list item?

My document schema looks like this:

What am I trying to do?
GET 10 documents from a Firestore collection using the HTTP flow funtion and store it somewhere such that I can use the “repeat with” property to display all the 10 docs one by one in a list item component