How to pass argument or return value from a function placed in view model and called in xml using data binding

Question

I have been trying to pass some argument and get a boolean as a return for a function placed in view model class and calling that function in xml using data binding.

View model:

class ChatViewModel: ViewModel() {

    val latestMessageFromFirst = MutableLiveData<String>()
    private val emailOfUser = MutableLiveData<String>()
    val isEmailValid = MutableLiveData<Boolean>()

    fun setEmailOfUser(email: String) {
        emailOfUser.value = email
    }

    fun setLatestMessageFromFirst(data: String) {
        latestMessageFromFirst.value = data
    }

    fun verifyEmailAddress() {
        emailOfUser.value?.let { email ->
            isEmailValid.value = email.isNotEmpty() && Patterns.EMAIL_ADDRESS.matcher(email).matches()
        }
    }
}

XML:

<androidx.appcompat.widget.AppCompatButton
            android:id="@+id/btnVerifyEmail"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/_30sdp"
            android:background="@drawable/stroke_button"
            android:text="@string/verify"
            android:onClick="@{() -> viewModel.verifyEmailAddress()}"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/etEmailOfUser"
            app:layout_constraintWidth_percent="0.3" />

Fragment:

class UserTwoFragment : Fragment() {

    private lateinit var binding: FragmentUserTwoBinding
    private val viewModel: ChatViewModel by activityViewModels()

    override fun onResume() {
        binding.viewModel = viewModel
        super.onResume()
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        binding = DataBindingUtil.inflate(inflater, R.layout.fragment_user_two, container, false)
        binding.viewModel = viewModel
        binding.lifecycleOwner = this
        val view = binding.root

        binding.etEmailOfUser.addTextChangedListener(object : TextWatcher {
            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {  }

            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                var email = ""
                s?.let {
                    email = it.toString()
                }
                viewModel.setEmailOfUser(email)
                viewModel.isEmailValid.observe(viewLifecycleOwner) {
                    binding.tvIsEmailValid.text = if (it) {
                        getString(R.string.valid_email_text)
                    } else {
                        getString(R.string.invalid_email_text)
                    }
                }
                binding.viewModel = viewModel
            }

            override fun afterTextChanged(s: Editable?) {  }
        })


        return view
    }
}

Can anyone suggest how can I achieve the result of the function(called in xml) in my fragment(activity if not using fragments)?