Please see my post 451 above as an example: You can add them as a virtual switch in SmartThings and interact with them via Automations in the Apple Home app. (e.g. if virtual switch turned on, turn on device. or if device turned on, turn on virtual switch).
If you are using a virtual dimmer switch you can perform different actions based on to 100 different dim-level % (e.g. if device A is on set dimmer to 30%, if device B is on set virtual dimmer to 40%)