ForRo/app/Http/Resources/LocationCollection.php

<?php

namespace App\Http\Resources;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\ResourceCollection;

class LocationCollection extends ResourceCollection
{
    /**
     * Transform the resource collection into an array.
     *
     * @return array<int|string, mixed>
     */
    public function toArray(Request $request): array
    {
        //return parent::toArray($request);

        return [
            'listingCount' => count($this->collection),
            'locations'    => LocationResource::collection($this->collection),
        ];
    }
}