Laravel Cron Job not working on AWS lightsail LAMP

I am using Laravel 7 and AWS lightsail LAMP server for my application.

When I am running this

php artisan schedule:run

command manually it's working properly. But, when I am creating a cron job for this it's not working.

Here is my cron code as laravel documention:

* * * * * cd /opt/bitnami/apache/htdocs && php artisan schedule:run >> /dev/null 2>&1

Here is my app/Console/Karnel.php

<?php

namespace App\Console;

use Illuminate\Console\Scheduling\Schedule;
use Illuminate\Foundation\Console\Kernel as ConsoleKernel;

class Kernel extends ConsoleKernel
{
    /**
     * The Artisan commands provided by your application.
     *
     * @var array
     */
    protected $commands = [
        Commands\DeactiveCoupon::class
    ];

    /**
     * Define the application's command schedule.
     *
     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
     * @return void
     */
    protected function schedule(Schedule $schedule)
    {
         $schedule->command('coupon:deactive')->everyMinute();
         $schedule->command('queue:restart')->everyMinute();
         $schedule->command('queue:work')->everyMinute();
    }

    /**
     * Register the commands for the application.
     *
     * @return void
     */
    protected function commands()
    {
        $this->load(__DIR__.'/Commands');

        require base_path('routes/console.php');
    }
}

But, if I add this cron:

* * * * * cd /opt/bitnami/apache/htdocs && touch mytestfile.txt >> /dev/null 2>&1

It's creating a new file named mytestfile.txt

But, this Laravel command not working in cron!

* * * * * cd /opt/bitnami/apache/htdocs && php artisan schedule:run >> /dev/null 2>&1

How can I solve this?

After I run

which php I got /opt/bitnami/php/bin/php

and my cron code is:

* * * * * cd /opt/bitnami/apache/htdocs && /opt/bitnami/php/bin/php artisan schedule:run >> /dev/null 2>&1

It's working for me Thanks @apokryfos bro