xxxxxxxxxx
In laravel 11, kernel.php is no longer present and the related configuration should be handled through the bootstrap/app.php file.
Task scheduling is done in routes/console.php file in laravel 11.
For more detailed information about bootstrap/app.php file you can check this link.
https://laravel-news.com/laravel-11-directory-structure#content-the-app-directory
Also check the release note of the laravel 11 here..
https://laravel.com/docs/11.x/releases
https://laravel.com/docs/11.x/releases#scheduling
I hope it will help you.