Eye tracking calibraton app is not working properly in SteamVR environment. So if someone is using PimaxEVO with OpenPort and Sboys3 driver, switch to PimaxPlay and default Pimax env is necessary for calibration.
This issue is happening because calibration app is not recognized as VR app by SteamVR and can’t be opened as proper VR app only window on desktop and it cant be user properly for calibration.