Have you used navigation through Fragment in your projects?

Yes, in my projects I have used navigation with Fragments. This allows dynamically changing the screen content without restarting the Activity, which improves performance and user convenience. For example, when implementing an interface with multiple tabs, I created separate Fragments for each tab and switched between them using FragmentManager:

supportFragmentManager.beginTransaction()
    .replace(R.id.container, MyFragment())
    .commit()

I also used the back stack for proper handling of the "back" button.