Count post type of Pods entity

I have custom post type Task where I assigned Users as Volunteers.

https://i.stack.imgur.com/Yqnum.png

Now I would like to fetch how many tasks assigned to a Volunteer.

I am using below code.

    $users = new WP_User_Query(array(
    		'meta_query' => array(
    			'relation' => 'OR',
    			array(
    				'key' => 'last_name',
    				'value' => $_POST['search'],
    				'compare' => 'LIKE',
    			),
    		),
    	));
    	$users_found = $users->get_results();
    
    
    	$names = array();
    	foreach ($users_found as $user) {
    		$this_users_tasks = get_user_meta($user->ID,'task',false);
    		$names[$user->ID] = $user->display_name.' ('.count($this_users_tasks).')';
    	}
    
    	
    	echo json_encode($names);
    	die;

But I am getting wrong result.