Wattman is a setting off of gaming then global setting within Radeon Settings. If Radeon Setting is not loading properly for you then install the driver again, use the following method.
Download 19.2.2 to you local machine.
Disconnect from the Internet, yes do this, it keeps Windows Update from screwing up your install.
Run the AMD driver install, uncheck the participate in AMD telemetry check box, and choose clean install, it's the option to the right bottom corner.
Reboot and if all is not well,
Reistall the driver again, this time choose express install and simply install over the existing driver. This often helps when Radeon Settings is for whatever reason not showing up or launching when clicked.
If this doesn't help let AMD know:
Online Service Request | AMD