I tried to move the edittext focus to one to another (next) when selecting the autofill (suggestions from top of the keyboard). But it is not moving properly.
The approach I tried is mentioned below.

@RequiresApi(Build.VERSION_CODES.O)
    private fun setOnAutofillCompleteListener(currentEditText: EditText, nextEditText: EditText) {
        currentEditText.setOnFocusChangeListener { v, hasFocus ->
            autofillManager.let {
                if(!hasFocus) return@setOnFocusChangeListener
                autofillManager.registerCallback(object : AutofillManager.AutofillCallback() {
                    override fun onAutofillEvent(view: View, event: Int) {
                        if (event == EVENT_INPUT_UNAVAILABLE || event == EVENT_INPUT_HIDDEN) {
                                nextEditText.requestFocus()
                        }
                    }
                })
            }
        }
    }

In onCreate of the Activity called the below method

@RequiresApi(Build.VERSION_CODES.O)

private fun registerAutoCompleteListener() {
    setOnAutofillCompleteListener(binding.firstName,binding.lastName)
    setOnAutofillCompleteListener(binding.lastName,binding.emailAddress)
    setOnAutofillCompleteListener(binding.emailAddress,binding.phoneNumber)
    setOnAutofillCompleteListener(binding.phoneNumber,binding.password)
    setOnAutofillCompleteListener(binding.password,binding.passwordConfirmPassword)
}

Initialized the AutofillManager system service like lateinit property

autofillManager = getSystemService(AutofillManager::class.java)

For example, on selecting the (autofill) suggestion (Firstname Lastname), the first and second edittext should be filled and the focus move to next email address edittext.