Replace back arrow from navigation bar with hamburger

My navigation at HomeFragment has hamburger icon which open navigation drawer.

When I open another fragment from navigation drawer I am getting back arrow that when clicked on will return me to HomeFragment.

How can I disable back arrow and replace it with existing hamburger that open navigation drawer?

private fun navigation(){
        setSupportActionBar(toolbar)
        navController = Navigation.findNavController(this, R.id.startingFragment)
        NavigationUI.setupWithNavController(navigation_view, navController)
        NavigationUI.setupActionBarWithNavController(this, navController, drawer_layout)
    }