Hello!
Sorry for the delay, Oculus Integration is their own plugin, and it doesn’t affect the InputDevice APIs. What you are going to want to use to get the latest InputDevice data (that user presence feature was added in September), is to include the new XR Plugin Architecture Oculus package. In Window->Package Manager, be sure to install ‘Oculus XR Plugin’, anything above 1.0.3. This will require XR Management and XR Loaders. See this Forum post for info on our new XR Plugin setup: XR Plugins and Subsystems
After that, it should ‘just work’ in that HMD devices should contain a userPresence feature.
If you are on the Oculus XR Plugin and at a current version, ping back, something must have gone wrong.