Hi Jason,
I used Onyx to find the locations.
For the Netflow settings of a VDPortgroup you can use:
$VDPortgroup.ExtensionData.Config.DefaultPortConfig.IpFixEnabled
For the Netflow settings of the uplinks you can use:
$VDSwitch.ExtensionData.Config.IpfixConfig
$VDSwitch.ExtensionData.Config.SwitchIpAddress
$VDSwitch.ExtensionData.Config.UplinkPortPolicy