Hello Hoxsieq,
It sounds like you're running into an issue controlling your HomeKit devices on your Apple Watch after updating.
First, let's be sure you have the latest version of iOS (14.0.1) and watchOS (7.0.1) on your devices. The articles below will guide you.
Update your Apple Watch
Update your iPhone, iPad, or iPod touch
If you're running the latest versions, let's try restarting both devices as shown here:
How to restart your Apple Watch
Restart your iPhone
If you're still running into that issue afterwards, take a look at this article for help using that feature: Control your home with Apple Watch
This should help to clear this up for you, but if you need further help, we'd recommend providing the Community with more details about exactly what's happening when you try to control those devices.
Take care!