When a new Z-Wave device added or removed from then Homekit needs to be synchronized. To do this we use Thinka App. Open Thinka App. You will already see a red warning on the device which mean there a couple of devices or rooms needs to synchronized. You go in to device and hit "Synchronize ..." button. It will synchronize Thinka with apple Home in terms of rooms and device(s). Here is the images that might be helpful for it;
