This article clarifies the support and considerations for taking, restoring, and maintaining snapshots of the SDDC Manager appliance.
VMware SDDC Manager
Taking and Restoring Snapshots
By following standard vSphere VM procedures, you can capture, restore, and delete SDDC Manager snapshots.
Reference: Manage Snapshots
Impact and Best Practices
Maintaining a snapshot does not impact SDDC Manager functionality. However, snapshots are not backups and should only be used as a temporary rollback measure.