doValidate() not getting invoked when Panel from class is added in createCenterPanel()

I have extended dialog wrapper as below:

public class MyCustomDialog extends DialogWrapper {

  private MyScreen myScreen;
  public MyCustomDialog(){
    super(false);
    init();
  }

  @Override
  protected JComponent createCenterPanel(){
    myScreen = new MyScreen();
    return myScreen.getRootPanel();
  }

  @Override
  protected ValidationInfo doValidate(){
    String element1 = myScreen.getTextFieldElement1().getText().trim();
    String fileLocation = myScreen.getTextFieldFileLocation().getText().trim();
    
    if(element1.equals("<some value>")){
      return new ValidationInfo("Error");
    } else if (fileLocation.equals("<some value>")){
      return new ValidationInfo("Error");
    }
    return null;  
  }

}

MyScreen is having .form as UI and related java class is something like:

public class MyClass{
  private JPanel panel;
  private JTextField textFieldElement1;
  private TextFieldWithBrowseButton textFieldFileLocation;

  public JTextField getTextFieldElement1(){
    return textFieldElement1;
  }

  public TextFieldWithBrowseButton getTextFieldFileLocation(){
    return textFieldFileLocation;
  }

  public JPanel getRootPanel(){
    return panel;
  }

}

When createCenterPanel() of dialog wrapper creates UI from this MyScreen or any other similar class, doValidate() does not get invoked automatically. It does not getting invoked automatically as mentioned https://jetbrains.org/intellij/sdk/docs/user_interface_components/dialog_wrapper.html#dialogwrapper

Is doValidate() meant for invoked automatically only for the Panel created through code inside createCenterPanel() ?

@...: any help is appreciated.