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.
Please provide your SDDC version in the case