To build yourself a "Look trigger" plugin, you could look into how VirtualLock checks where the player is looking at. There you can place "FocusArea" plugins to define capsules (with radius and height), potentially parented to a character, to define where the player is supposed to look at. Of course without actual eye tracking, looking is defined by what the center of the VR headset points at.
Both VirtualLock and FocusArea plugins are part of "Connect":
Connect is a plugin package that allows you to control external applications and devices via network. This could be an audio-driven E-Stim devices, or now also the GPIO pins of a Raspberry PI, essentially pins you can turn on/off to control...
hub.virtamate.com