To play on controller with keyboard and mouse in V Rising, the current workaround is to Enable Steam Input and configure it as a keyboard and mouse emulator.
Open V Rising’s property window in Steam via right-clicking on the game in you library and selecting Properties.. > Controller. In the Controller tab, select the Enable Steam Input option in the dropdown. Then click the Controller Configurator link highlighted below:
Inside the Controller Configurator, you can create and customize a new layout under Templates, using the Keyboard (WASD) and Mouse template. You can also browse Community Layouts.
Configure the controller settings to fit your needs. There are guides available online, Steam’s guide for this is available here.