Confirm if all steps have been completed to remove HCX from VMC - Uninstall HCX deployment from Connector & Cloud (74869) (vmware.com). If HCX is still showing 'Active' under the VMC Console after deactivating HCX, please create a support request with VMC Global Support (Creating and managing Broadcom support cases) with the following information:
Workaround:
If after the cleanup is completed, and the HCX plug-in is still present within the vCenter, the following process can be performed to remove the plug-in - Uninstall HCX deployment from Connector & Cloud (74869) (vmware.com).