Suggested by Philipp Dehner – Under Review
Make possibility to show external values over MQTT, OPCUA, etc.
Show values and use it for decision trees.
Status Details
Currently, you can surface values via the embedded website or PowerApp https://docs.microsoft.com/en-us/dynamics365/mixed-reality/guides/pc-app-website-powerapps-link
Adding conditional logic, to select branches in the guide isn't currently supported but you could use PowerAutomate to dynamically change content in a guide based on the values in another system.