Cheap and harmless infrared coupled with ML imaging is being worked on by companies I know of that can deeply see into the brain with micron-level precision and without the need of expensive MRI or CAT Scan room-filling equipment (OpenWater and Neurable for example). This tech could eventually be turned into a phone app or similar cheap device that we could directly train our emotional state on. The app would see our various emotions and degrees of intensity as it happens. That is entirely different if we can both experience our emotions and also see them directly confirmed by an app in real time. This helps take the 3rd person observation problem of consciousness into 1st person. That still doesn't solve the problem of knowing an artificial consciousness is actually experiencing things but at least its a step closure to understanding it.