Cemu Amiibo functionality still hasn’t gotten to the point where it can be called reliable but it can definitely be used to add Amiibo manually to games. You can’t scan your Amiibo Figurines but you can download the Amiibo files directly and place them in your game folder which Cemu will pick-up and add to your game on its own. Cemu Amiibo functionality can definitely use some work but considering the emulator is still in beta and more than few bugs still need to be fixed, we shouldn’t accept any major updates for Cemu Amiibo functionality any time soon.