NSX Cloud components are upgraded using the CSM Upgrade Coordinator.

The NSX Cloud Upgrade Workflow

First upgrade NSX Cloud components as follows. After that, upgrade NSX-T Data Center.
Note: Upgrading NSX Cloud components from NSX-T Data Center 2.3 or earlier to NSX-T Data Center 2.4 or later is not supported. If you are upgrading from NSX-T Data Center 2.3 or earlier, you must uninstall NSX Cloud components and reinstall them. See instructions in the topic: Upgrading NSX Cloud from NSX-T Data Center 2.3 or earlier