Integration with Amazon Alexa, Google Assistant, and HomeKit are still undergoing development. Once the 3rd party compatibility feature is available, eufy app will send out a notice. Here is the list of doorbells' smart integration.
 

Amazon Alexa - Supported.

Google Assistant - Supported.

HomeKit - Not supported.

Home Assistant - Not supported.

SmartThings - Not supported.

SmartLife - Not supported.

Wink - Not supported.

Nest - Not supported.

Blue Iris - Not supported.

Ip-cam viewer - Not supported.

IFTTT - Not supported.

If you want to learn more about smart integration with Alexa and Google Assistant, please refer to Using Amazon Alexa and Using Google Assistant.

Tell me more about Compatibility Between eufySecurity Devices and Smart Home Devices.