I am developing an application in android. I am using the storage access framework, and I can select multiple files, but not folders. Is it not possible to select folders?

What we tried 1

Multiple file selections were possible, but not folder selections.

class MainFragment : Fragment() {
private val launcher = 
    registerForActivityResult(ActivityResultContracts.GetMultipleContents()){ result ->
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        binding.materialButton.setOnClickListener {
            launcher.launch(null)
        }
    }
}

What we tried 2

Multiple selections and file selections were not available.

class MainFragment : Fragment() {
    private val launcher = 
        registerForActivityResult(ActivityResultContracts.OpenDocumentTree()){ result ->

    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        binding.materialButton.setOnClickListener {
            launcher.launch(null)
        }
    }
}