I don't believe there's a website that provides Laravel notification templates but Laravel makes it quite easy to create your own styles/templates or modify the existing ones to suit your needs or match your brand.
You can find more information on how to publish and customize the notification templates at https://laravel.com/docs/9.x/notifications#customizing-the-templates
Here is a tutorial that takes you through editing a notification template https://medium.com/@christianjombo/customizing-laravels-default-notification-email-template-adding-a-logo-and-changing-ff6f107dd640
If you wanted to use or look into using an email framework for rapid HTML email development I would suggest checking out Maizzle Email Framework which has great documentation to aid you in your project and uses Tailwind CSS!