Hi @swei1215, were you able to run the mouse emulation within the XR SDK sample scene.. ie the 3 cubes? It should be enough to simply put mouse emulator at the top of the hierarchy without any need to disable an XR settings.
Indeed, you are right that I’m afraid the Pico Preview Tool does not yet support the Tobii XR SDK.. but it does support the pico eye tracking metrics, so a possible workaround is to use the pico data stream for debug and switch to Tobii for release.