The Oculus Integration shows how to integrate Quest Hand Tracking. There is a demo scene included that shows how to draw using hand tracking, as well as a sample scene with a player that uses Oculus OVR components, such as OVRManager.
First install the Oculus Integration asset. Then extract the integration package found at "/BNG Framework/Integrations/Oculus Integration". Finally, enable the integration by navigating to VRIF -> VRIF Integrations and enabling the Oculus Integration checkbox.
After extracting the integration package you can check out the included demo scene for the Oculus player or Quest Hand Tracking.
Hand Tracking is handled by the script found in /Scripts/Extras/HandTracking.cs. It manages grabbing and the hiding of hand models while hand tracking is active. Make sure that the LeftHand / RightHand "OVRHand" properties are set on this component, otherwise grabbing and model hiding will not work.