Troubleshooting Server-Client Animation and Object Synchronization

[Momonan0412]

Hello! I am currently doing a project, school-related.

I already watched these tutorials.
https://www.youtube.com/watch?v=wEtFA1EbiP8&t=195s
https://www.youtube.com/watch?v=-sXkHTQKszk

and, I can't seem to grasped on how to make the server "send" and animation to the client and I also don't know how to make the "level" appear in my client side.

this is my client method

 private void OnClient() {
    getService(MultiplayerService.class).addEntityReplicationReceiver(connection, getGameWorld());
    getService(MultiplayerService.class).addPropertyReplicationReceiver(connection, getWorldProperties());
    if(player2 != null){
        Viewport viewport2 = getGameScene().getViewport();
        viewport2.setBounds(-1500,0,250*7,getAppHeight());
        viewport2.bindToEntity(player2,getAppWidth()/2,getAppHeight()/2);
        viewport2.setLazy(true);
    }
} 

and this is my server:

  private void OnServer() {
   getNetService().newUDPServer(55555);
    spawnHandler();
    Viewport viewport1 = getGameScene().getViewport();
    viewport1.setBounds(-1500,0,250*7,getAppHeight());
    viewport1.bindToEntity(player1,getAppWidth()/2,getAppHeight()/2);
    viewport1.setLazy(true);

    collisionHandler();
}


private void spawnHandler() {
    player1 = null;
    player2 = null;
    nextLevel();
    player2 = spawn("player",550,50);
    getService(MultiplayerService.class).spawn(connection, player2, "player");

    player1 = spawn("player", 50,50);
    getService(MultiplayerService.class).spawn(connection, player1, "player");

    set("player", player1);
    set("player", player2);

    var background = spawn("background");
    getService(MultiplayerService.class).spawn(connection, background, "background");
}


    private void setLevel(int levelNum){

    if(player1 != null && player2 != null){
        player1.getComponent(PhysicsComponent.class).overwritePosition(new Point2D(50,50));
        player1.setZIndex(Integer.MAX_VALUE);

        player2.getComponent(PhysicsComponent.class).overwritePosition(new Point2D(50,50));
        player2.setZIndex(Integer.MAX_VALUE);
    }
    setLevelFromMap("tmx/level1.tmx");
}

can someone please help me :(