Java SE (Java Platform, Standard Edition)

I seem to be struggling with some UI concepts.

I have a ListView that I'm populating with Task. I understand that fairly well.

Once the ListView is populated, each item represents a new long running Task. When the user kicks off those subsequent tasks, I want to provide feedback on progress as the application loops through each. I thought the best way to do this is would be with an HBox. Each ListView row consists of an HBox, which in turn contains a ProgressIndicator and the name of the long running task. So in my first long Running task used to populate the ListView, I do something roughly like this:

updateMessage("Start");

items = FXCollections.observableArrayList();

For Loop
{
    HBox hbox = new HBox();
    hbox.setAlignment(Pos.CENTER_LEFT);
    hbox.setSpacing(10);

    ProgressIndicator pi = new ProgressIndicator();
    pi.setVisible(false);
    pi.setProgress(0);
                    
    Text t = new Text("MyLabel");
                    
     hbox.getChildren().addAll(pi, t );
            
     items.add(hbox);
}
                
updateMessage("Done");

What I'm unsure of is how to access the ProgressIndicator in the main thread in order to bind it to the second series of long running tasks. I was thinking I could loop through the ListView, then query the HBox in each item for the ProgressIndicator. But that doesn't seem possible.

I ended up creating a separate List of ProgressIndicators in the main thread that I pass into the long running Tasks. Now my Task looks something like this:

public class MyTask extends Task<ObservableList<HBox>>
{
    private List<ProgressIndicator> progress
    
    public MyTask (List<ProgressIndicator> progress
    {
        this.progress = progress;
    }

    @Override 
    public ObservableList<HBox> call() 
    {
        ObservableList<HBox> items = null;
        

        updateMessage("Start...");

        // For loop here to loop through all items
        // for(int i=0; i < items; i++
        HBox hbox = new HBox();
        hbox.setAlignment(Pos.CENTER_LEFT);
        hbox.setSpacing(10);
                    
        Text t = new Text("My Label");
                    
        hbox.getChildren().addAll(progress.get(i).pi, t );
            
        items.add(hbox);

        updateMessage("Done " );
    
        return items;
    }
}

Then when I kick of the secondary long running tasks, I bind the correct ProgressIndicator in the list to the Task (s)

progress.get(0).pi.progressProperty().bind(myNewTask.progressProperty());

I feel I'm missing something and there is a better way?