✅ Which is the more correct way of class instantiation?

// app.axaml.cs
public override void OnFrameworkInitializationCompleted()
{
    if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
    {
        Helpers hp = new();

        desktop.MainWindow = new MainWindow
        {
            DataContext = new MainWindowViewModel(hp),
        };
    }

    base.OnFrameworkInitializationCompleted();
}

// MainWindowViewModel.cs
public class MainWindowViewModel : ViewModelBase
{
  private Helpers _hp = new();

  // this part is 100% optional. You can use helpers as _hp as well
  public Helpers Hp
  {
      get => _hp;
      set => this.RaiseAndSetIfChanged(ref _hp, value);
  }
}

public MainWindowViewModel()
{
    Text = "Hello World!";
}
public MainWindowViewModel(Helpers hp)
{
    _hp = hp;
}