Quickly jumping in here to say that we have taken over development of the official Futurehome App for Homey with one of our agencies. We have received samples of almost all missing products and will start adding those as far as its technically possible. The smoke alarms (both 230v and battery), the HAN sensor, LED dimmer, puck relay and scene switcher will all be added.
As for the car charger we are struggling as you need to first connect it to a Futurehome hub to enable Zigbee, only afterwards can it be paired to another Zigbee controller. But we are figuring that out and have asked Futurehome if Zigbee can be enabled in another way.
Keep an eye on the app for updates!