Which layer can optionally be managed by Citrix Cloud, when designing Citrix Cloud architecture?

The architecture Layer is the following:

User: represent the endpoints

Access: represent the storefront and Citrix Gateway

Control: represent the delivery controller, database, studio, license, director

Resources: represent the VDAs

Host: represent the hardware, fiscal server, storage, network, etc.

Page 33, 34 and 35from the hand book: https://docs.citrix.com/en-us/xenapp-and-xendesktop/7-15-ltsr/downloads/handbook-715-ltsr.pdf