Displaying 3D controller models - GodotVR/godot_openvr GitHub Wiki
OpenVR carries 3D models of controllers, base stations and HMDs. Wherever possible these models reflect the actual physical appearance of the devices.
In Godot OpenVR the OpenVRRenderModel class can be used to load these models into your game or application to be displayed to the user.
You can use addons/godot-openvr/scenes/ovr_controller.tscn
instead of your ARVRController
nodes and it should work out of the box.