Adobe XD only runs on 64-bit systems and does not support deployment with a CCE serial number. If you select the 32-bit Package option and/or the Serial Number-based licensing type in CCP, it will not appear in the list of available products.
Change the licensing type in CCP to Named User and set the target system type to 64-bit and check if the application appears now. If you are already using Named User licensing and are targeting 64-bit systems and XD is still not appearing, check that your system is not pointing to an out-of-date update server. See Expected updates and products are missing from CCP for more information.