I am complete UE noob, I hope my question will make sense.
If I want to test out an AR project, do I need to build it and deploy it on a device every single time? Or is there a mock device in the editor that allows for testing without having to build and deploy?
I emulate AR on PC builds of my apps by creating a fake ground plane on which objects can be placed. You can check if AR is supported at run-time to do this. You need to also implement some former of camera control to look around with mouse/controller.