Laravel schedule failed in Cronjob

I have deployed my Laravel app & set my schedule to ubuntu cron job as Laravel documentation. php 7.3 & php8.0 are installed in the machine. meanwhile I see some errors inside my db->telescope_entries as shown below

{"command":"'\/usr\/bin\/php8.0' 'artisan' snooze:send","description":null,"expression":"* * * * *","timezone":"UTC","user":null,"output":"","hostname":"myApp"}
{"command":"'\/usr\/bin\/php8.0' 'artisan' bookingExpiredAfterTimeLimit","description":null,"expression":"*\/10 * * * *","timezone":"UTC","user":null,"output":"","hostname":"myApp"}

on my server side sudo crontab -e

# m h  dom mon dow   command
* * * * * cd /var/www/myapp && php artisan schedule:run >> /dev/null 2>&1

Inside app->console->commands->ExpiredBooking

class ExpiredBooking extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'bookingExpiredAfterTimeLimit';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'all Booking Expired Time Limit';
....

Can any body explain me what's happening? I am completely lost