We don't work with UWP because we don't have a UWP SDK. Thus our core software doesn't run inside the UWP sandbox.
HOWEVER, we do work with SteamVR, and UWP supports SteamVR. Build for SteamVR, and you're golden.
If UWP is absolutely necessary, you need to pass the hand tracking data from the API into the UWP sandbox. This can be a difficult undertaking.