Passing Data between fragments while using Bottom Navigation

Question

I need recommandation or explanation because i am little bit lost

I am using bottom navigation with 3 fragments

First one is called RestaurantFragment which contains an itemsList of restaurants that i am getting from the server and loading this data to a recycler view

And the second one is FavorisFragment which contains a subList of the fist itemList and i have that subList in the itemAdapter class

So i have searched how could i pass the data between my two fragments ( or between recyclerView and a fragment ) , but i only found one that send data from fragment to an other using Bundle

the issue is that the fragment change is hapening in the MainActivity

i have a solution which works pretty fine but i think it is memory consuming

this is my MainActivity :

import android.os.Bundle;
import android.view.MenuItem;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;

import com.google.android.material.bottomnavigation.BottomNavigationView;

public class MainActivity extends AppCompatActivity {


    BottomNavigationView bottomNavigationView ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                new RestaurantFragment()).commit();
        bottomNavigationView = findViewById(R.id.navigation);
        bottomNavigationView.setOnNavigationItemSelectedListener(navigationItemSelectedListener);

    }

    private BottomNavigationView.OnNavigationItemSelectedListener navigationItemSelectedListener =
            new BottomNavigationView.OnNavigationItemSelectedListener() {
                @Override
                public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
                    Fragment selectedFragment ;

                    switch (menuItem.getItemId()){
                        case R.id.nav_restaurant :

                            selectedFragment=new RestaurantFragment() ;
                            break;
                        case R.id.nav_favoris :
                            selectedFragment=new FavorisFragment() ;
                            break;
                        case R.id.nav_client :
                            selectedFragment=new ClientFragment() ;
                            break;
                        default:
                            selectedFragment=new RestaurantFragment() ;
                    }

                    getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,selectedFragment).commit();
                    Fragment currentFragment = getSupportFragmentManager().findFragmentById(R.id.fragment_container);
                    return true ;


                }
            };


}

and i am using MyApplication to hold the two lists the one that i get from the server and the subList that the client choose as favorite

Here MyApplication

import android.app.Application;

import java.util.ArrayList;

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;
    }
    private static MyApplication mInstance;

    public static synchronized MyApplication getInstance() {
        return mInstance;
    }
    private ArrayList<RecyclerItem> itemList;
    private ArrayList<RecyclerItem> recyclerData;

    public ArrayList<RecyclerItem> getRecyclerData(){
        return recyclerData;
    }

    public void setRecyclerData(ArrayList<RecyclerItem> recyclerData){
        this.recyclerData=recyclerData;
    }

    public ArrayList<RecyclerItem> getItemList(){
        return itemList;
    }

    public void setItemList(ArrayList<RecyclerItem> itemList){
        this.itemList=itemList;
    }

    public void deletAll(){
        this.itemList.clear();
    }
}

in itemAdapter i am using this to send data :

 MyApplication.getInstance().setItemList(itemListFavoris);

and in FavorisFragment i am using this to get data :

        itemList = MyApplication.getInstance().getItemList();