Reload fragment using Navigation Component

I am using the navigation component to load my fragments like given here: https://developer.android.com/guide/navigation/navigation-getting-started

navController = findNavController(R.id.nav_host_fragment)
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        val appBarConfiguration = AppBarConfiguration(
            setOf(
                R.id.navigation_opt1,
                R.id.navigation_opt2,
                R.id.navigation_opt3,
                R.id.navigation_more
            )
        )
        setupActionBarWithNavController(navController, appBarConfiguration)
        navView.setupWithNavController(navController)

I also have a Toolbar at the top with a Spinner. I want to reload/refresh the fragment & its view model when the spinner item is selected. I tried the below code for reloading but it isn't working. Also, I know we should not be using fragmentManager in Navigation Component

val ftr: FragmentTransaction = requireFragmentManager().beginTransaction()
        ftr.detach(this).attach(this).commit()

Any help would be appreciated.

sorry for late reply. I am using below code for the same scenario. That might help. call this method in your spinner ItemClick. we have to use popbackstack for avoid adding same fragment again and again.

  private fun refreshCurrentFragment(){
        val id = navController.currentDestination?.id
        navController.popBackStack(id!!,true)
        navController.navigate(id)
    }