A new feature in SDDC has been released allowing for Out of band changes to be made and then synced to SDDC.
VMware Cloud Foundation 5.2.2
Out of band changes are a new feature available since 5.2 SDDC, which allow you to make changes to vCenter/hosts outside of SDDC and then sync these changes to the environment
For a list of guardrails to follow when making out of band changes, please open a support case with GSS for guidance on this because it is still subject to change and is not currently available for public release.
Please provide your SDDC version in the case.