Tuya smart security camera software to enable access in Google Home

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I bought a Tuya security camera that suggested it would work with Google Assistant/Google Home.

The camera, along with other devices such as relays and temperature sensors, can be added to both the Tuya and SmartLife apps but after Linking either app to Google Assistantin setting up a Google Home, when I connect, all devices EXCEPT the camera are available.

Reading the specifications fine print it said:

• Can be customized to support Google Hub, google chromecast, echo show and other smart speakers with screens (paid service)

but I haven't been able to find where to purchase the "paid service" anywhere.

Can anyone tell me where to purchase the download to enable me to see the camera in Google Assistant/Home?