In the VCF Operations UI, browsing to Fleet Management >> Passwords, only the option to Update Password or Remediate Password are present.
There is no option to Rotate Password.
Documentation explains that it is necessary to login to the SDDC Manager UI to rotate passwords: Rotate Passwords for VMware Cloud Foundation Components
However it is not possible to rotate passwords for:
VCF Operations 9.0.x
It is currently not possible to configure password rotation for the following VCF Management components:
If you require this feature please submit a feature request using the following instructions: Submitting new features or enhancement requests for VCF Operations