Alexa works only when the device is connected to the internet properly. So please check if the strip light is connected to the internet or not.
The strip lights are not connected to the internet if:
1. A red exclamation mark appears on Wi-Fi symbol
2. The strip lights cannot be controlled via the Govee Home app when Bluetooth is turned off on your smartphone.
3. Please search for FAQ
4. The strip lights have successfully connected to the internet.
Please log out of your Govee Home account, then reconnect to Alexa or Google Assistant.
After successfully connecting, you can now log back into your Govee Home app account.