new to JavaFX and I’m using SceneBuilder to make a scrollingframe with a VBox inside which has infinite VBoxes inside (user can create them).
The problem is my setup doesnt work. Im using an AnchorPane with a ScrollingPane inside. The rest with this code:

public class ManagerSceneController {

    @FXML
    private ScrollPane ScrollingContainer;
    
   public void initialize() {
       FillScrollPane();
   }
    
    public void FillScrollPane() {
        System.out.println("Führe aus");
        VBox cardContainer = new VBox(10);
        cardContainer.setPadding(new Insets(10));
        
        for (int i = 1; i <= 50; i++) { // TO DO: Replace with actual loading
            VBox card = CardComponent.createCard("Webseite"+i, "Username"+i, "Password"+i);
            cardContainer.getChildren().add(card);
            
            System.out.println(card);
            System.out.println("Number of children in cardContainer: " + cardContainer.getChildren().size());
            ScrollingContainer.setFitToWidth(true);
            ScrollingContainer.setFitToHeight(true);
            System.out.println("Erfolgreich ausgeführt");
        }
    }

}

The prints all print and it looks normal but the scrollingPane is just empty.

Card class:

public class CardComponent {
public static VBox createCard(String website, String username, String password) {
    Label websiteLabel = new Label("Website: ");
    Label usernameLabel = new Label("Username: ");
    Label passwordLabel = new Label("Password: ");
    
    VBox card = new VBox(10);
    card.getChildren().addAll(websiteLabel, usernameLabel, passwordLabel);
    card.setPadding(new Insets(10));
    card.setStyle("-fx-border-color: black; -fx-border-width: 1px;");
    
    
    
    return card;
}
}

I was expecting the scrollingPane to be filled with cards with 3 labels each and some padding in between.