BaoMa/app/Imports/Order/vaccineOrder.php

<?php

namespace App\Imports\Order;

use App\Models\Orders;
use Maatwebsite\Excel\Concerns\WithBatchInserts;
use Maatwebsite\Excel\Concerns\WithChunkReading;
use Maatwebsite\Excel\Concerns\WithMultipleSheets;
use App\Imports\Order\vaccineSheet;

class vaccineOrder implements WithMultipleSheets,WithBatchInserts,WithChunkReading
{
    public function sheets(): array
    {
        return [
            new vaccineSheet()
        ];
    }

    public function batchSize(): int
    {
        return 1000;
    }

    public function chunkSize(): int
    {
        return 1000;
    }
}