Retained NexusDialog Fragment within a Fragment

Question

I'm using Android Studio default implementation of AppCompatActivity which create 3 Fragments HomeFragment GalleryFragment and SlideSHowFragment.

In GalleryFragment Layout I have added a LinearLayout referenced by R.id.gallerylinearLayout

I have create a class MyFormFragment extending NexusDialog FormFragment Class following NexusDialog examples https://github.com/dkharrat/NexusDialog

Within GalleryFragment Class method onCreateView(@NonNull LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) I use the Fragment Manager to add MyFormFragment in case no retained version exists by adding the following code to the method :

    FragmentManager fm = getParentFragmentManager();
    MyFormFragment formFragment;

    Fragment retainedFragment = fm.findFragmentByTag(FORM_FRAGMENT_KEY);
    if (retainedFragment != null && retainedFragment instanceof SettingsFormFragment) {
        formFragment = (MyFormFragment) retainedFragment;
        
    } else {
       
        formFragment = new MyFormFragment();

        fm.beginTransaction()
                .add(R.id.gallerylinearLayout, formFragment, FORM_FRAGMENT_KEY) //R.id.linearlayout is in FragmentHome
                .commit();
      
    }

My question is what should I do when the retainedFragement exists to have it in the had hoc container referenced by R.id.gallerylinearLayout ? With the current code MyFormFragment show up correctly inside the galleryFragment when first created but if I navigate to another Tab (let's Say HomeFragment) and come back to Gallery Fragment it does not show up.

TIA