Direct answer
They can control selected functions when the installed platform, current software, account service, and exact integration support them. Typical coverage can include lights, scenes, thermostats, entertainment, or other exposed devices, but command depth varies. A voice assistant may turn a television on without offering every source, guide, or transport function, and a feature available on one platform version may not exist on another.
Build a command matrix before promising integration: assistant, room, device, desired action, authentication requirement, cloud dependency, and fallback interface. Also check whether the feature needs a platform subscription and whether sensitive actions such as unlocking or disarming are restricted. Voice-assistant terms and platform integrations change, so use the current vendor documentation and test the final system rather than relying on brand logos.
How this answer was prepared
Camelback Smart Homes publishes this FAQ library for homeowners, design professionals, builders and property teams comparing integrated technology. Answers begin with the practical conclusion, then explain the factors that can change it.
Limitations: This is general educational information, not a site-specific design, quote, code determination or compatibility guarantee. Final requirements depend on the property, construction, infrastructure, equipment versions and project goals.