Click a category at the top of the Home screen.
Accessories with multiple features are controlled by one accessory tile. For example, if you have a ceiling fan with a built-in light, you can control the speed of the fan and the brightness of the light from the same tile. Sensors are grouped by accessory categories at the top of the screen.
The available controls depend on the type of accessory.
Go to the Home app in the bottom-right corner.
Delete the accessory’s name, enter a new one, then click Apple Support article: Get notifications for your HomeKit accessories