controller is not use in route file in laravel 7 but it use in laravel 8 code example

Example 1: route resource laravel

Verb          Path                        Action  Route Name
GET           /users                      index   users.index
GET           /users/create               create  users.create
POST          /users                      store   users.store
GET           /users/{user}               show    users.show
GET           /users/{user}/edit          edit    users.edit
PUT|PATCH     /users/{user}               update  users.update
DELETE        /users/{user}               destroy users.destroy

Example 2: use resource in laravel 8

php artisan make:controller PhotoController --resource --model=Photo