Calling a ListView from a separate dart file--do I have to define my list as a parameter of all my widgets?

In my app, I have a ListView that I would like to populate with Firebase data. I successfully did it, but now, I would like to separate my ListView in another dart file

main.dart

class _MyHomePageState extends State<MyHomePage> {
  int currentPageIndex = 0;
  late List<QueryDocumentSnapshot<Map<String, dynamic>>> list;

  @override
  void initState() {
    print('INIT');
    FirebaseFirestore.instance
        .collection('bands').get().then(
          (querySnapshot) => {
            setState(() {
              list = querySnapshot.docs;
            }),
          },
        );
    super.initState();
  }

and then I am calling my custom View as part of Bottom Navigation:

  @override
  Widget build(BuildContext context) {
   
    return ...
      appBar: AppBar(
        ...
      ),
      bottomNavigationBar: NavigationBar(
        .....
      ),
      body:
          <Widget>[
            ArtistList(list),

and in a separate dart file

class ArtistList extends StatefulWidget {
  ArtistList(this.list);
  final List<QueryDocumentSnapshot<Map<String, dynamic>>> list;
  @override
  State<ArtistList> createState() => _ArtistListPageState(list);
}

class _ArtistListPageState extends State<ArtistList> {
  _ArtistListPageState(this.list);
  final List<QueryDocumentSnapshot<Map<String, dynamic>>> list;
  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemBuilder: (BuildContext context, int index) {
        var data=list[index];
       return  Text(data['name'])

....

This is working, but it's not really optimised.

Do I have to define my list as a parameter of all my widgets? I see a lot of redundancy there.

Remove

_ArtistListPageState(this.list);
  final List<QueryDocumentSnapshot<Map<String, dynamic>>> list;

Use

var data = widget.list[index];

The page state has access to all parameters in the stateful widget through the widget variable

Also when defining a list that might take some time before it is populated, I recommend setting it to an empty list rather than using late

In your HomePage, do this instead

 List<QueryDocumentSnapshot<Map<String, dynamic>>> list = [];