Yes, Snapt One does support transparent mode, although we do not recommend using it.
If you wish to enable this, please follow the instructions below:
Navigate to Balancer > Configuration > Default Settings
Expand Group Defaults
Enable Transparent Proxy setting and click on Save
Now all that is needed to apply the new setting is to reload the virtual load balancer to apply the change.
Please visit support.snapt.net if you need any assistance.