Passing of data between child/parent fragments

//ParentFragment.kt

package ru.alexandrkozlovskiy.fragmentissue

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import android.widget.TextView
import android.widget.Toast
import androidx.core.os.bundleOf
import androidx.core.view.isVisible

class ParentFragment : Fragment() {
    private lateinit var test: Button
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        childFragmentManager.setFragmentResultListener("", this) { key, bundle ->
                            test.isVisible = false
                Toast.makeText(context, "information received from child fragment", 1).show()
                childFragmentManager.setFragmentResult("", bundleOf(Pair("word", "test")))
            }
        }

        override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                                  savedInstanceState: Bundle?): View? {
            val view = inflater.inflate(R.layout.fragment_parent, container, false)
            test = view.findViewById(R.id.test) as Button
            val fragment: ChildFragment = ChildFragment()
            childFragmentManager.beginTransaction().replace(R.id.childcontainer, fragment, "child").commit()
            return view
        }
}
//ChildFragment.kt

package ru.alexandrkozlovskiy.fragmentissue

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import android.widget.Toast
import androidx.core.os.bundleOf

class ChildFragment : Fragment() {
    private lateinit var childView: TextView
    private fun sendInfoToParentFragment() {
        parentFragmentManager.setFragmentResult("", bundleOf(Pair("word", "child")))
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        parentFragmentManager.setFragmentResultListener("", this) { key, bundle ->
            Toast.makeText(context, "Receiving information from parent fragment", 1).show()
        }
        sendInfoToParentFragment()
    }

    override fun onCreateView(
            inflater: LayoutInflater, container: ViewGroup?,
            savedInstanceState: Bundle?
    ): View? {
        val view = inflater.inflate(R.layout.fragment_child, container, false)
        childView = view.findViewById(R.id.childtest) as TextView
        childView.setOnClickListener {
            sendInfoToParentFragment()
        }
        return view
    }
}
//MainActivity.kt

package ru.alexandrkozlovskiy.fragmentissue

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
val fragment:ParentFragment= ParentFragment()
        supportFragmentManager.beginTransaction().replace(R.id.maincontainer,fragment,"parent").commit()
}
}
//build.gradle

plugins {
    id 'com.android.application'
    id 'kotlin-android'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "ru.alexandrkozlovskiy.fragmentissue"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
    }
}

dependencies {

    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.3.2'
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    implementation 'androidx.fragment:fragment:1.3.0-rc01'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}