vCenter and NSX Root Account passwords can be seen as "Disconnected" in VCF Operations. This is typically caused by expired passwords.
VMware VCF Operations
VCF Operations does not automatically rotate the Root account passwords. This is a misconception sometimes seen due to VCF Operation's handling of internal service user accounts.
vCenter Server and NSX Root accounts can have their passwords manually reset from VCF Operations, but an automated or scheduled task cannot be created to do so. The password expiration policies can be set on each respective appliance locally: