firebase - Firestore collection query as stream in flutter

Question

I'm trying to query a few documents from a collection, this query should listen to changes made in the queried documents, so I'd need a stream. I'm doing following (in Dart/Flutter)

  Stream<List<MatchRequest>> _getNewMatches() {
    return Collection<MatchRequest>(path: 'requests')
        .ref
        .where('status', isNull: true)
        .where('users', arrayContains: ['$currentUid'])
        .orderBy('last_activity')
        .snapshots()
        .map((list) => list.documents.map(
            (doc) => Global.models[MatchRequest](doc.data) as MatchRequest));
  }

(The object Collection sets the path to the ref in it's constructor, eg: ref = db.collection($path) and the map makes a model of the results)

Then I'm using a StreamBuilder with stream invoking the method above and builder checking if snapshot.hasData. But it keeps loading, snapshot.hasData keeps being false. What am I doing wrong here?

EDIT:

1. My firestore security rules contain:

   match /requests/{requestId} {
       allow read: if isLoggedIn();
       allow write: if isLoggedIn();
   }
   

2. When removing every where and orderBy, it doesn't find anything as well. And there are documents present in the requests-collection

3. When trying to query only 1 document as a stream from the requests-collection, he does find the result

4. Is it because I should add indexes to my firestore indexes? But this won't solve my first problem which is that even without where and orderBy, it doesn't get any data

Answer 1

Waitting for answers