Add subcategory to controller dir in Symfony
# controllers are imported separately to make sure services can be injected
# as action arguments even if you don't extend any base controller class
App\Controller\:
resource: '../src/Controller'
tags: ['controller.service_arguments']
App\Controller\SubControler\: # assuming you have namespace like that
resource: '../src/Controller/SubControler'
tags: ['controller.service_arguments']