Laravel 8 pusher event name not working 'App\Events\eventnotify' instead of eventnotify

I'm trying to send real time notification from Laravel api to flutter app using pusher. When I send an event directly from pusher debug console, the flutter app receive correctly the event. When I send the event from Laravel nothing happens in the flutter app side, but I can see that the event shows on pusher debug console. the channel name is 'channelnotify' and the event name is 'eventnotify' but the received event on pusher debug console shows : Channel: channelnotify, Event: App\Events\eventnotify screenshot from pusher

instead of getting the event name as 'eventnotify', pusher gets the whole path 'App\Events\eventnotify' as event name, and I think this why the flutter doesn't intercept the event. I tried to change the event name to 'App\Events\eventnotify' in my flutter app but still not working. is there any way to force laravel to send the event name whithout path?

//send event api: 
 public function sendNotif($to_id,$context ,$context_id ,$label){

        $data = array(
            'to_id' =>$to_id,
            'context' =>$context,
            'context_id' =>$context_id,
            'label' =>$label,
            );
    
            $result = [];
            array_push($result,$data);

            $str_json = json_encode($result);
           
            event(new eventnotify($str_json));

            return $str_json;

    }

//event code
<?php

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class eventnotify implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $notif;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($notif)
    {
        $this->notif = $notif;
        
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new Channel('channelnotify');
    }
}