https://www.techradar.com/news/google-assistant-can-now-use-your-voice-to-control-over-5000-smart-home-devices

You can now use Google Assistant to control over 5,000 smart home devices, from dishwashers, doorbells and dryers to security systems, switches and sensors.

That's up from 1,500 supported devices back in January, and Google says the increase is down to the fact that it's now partnered "with all major manufacturers of connected devices for the home in the US."