Your devices must first be set up (i.e. paired) in the CBI Home app. Then you can link Astute devices to Google Assistant. This is the procedure if you have the Google Home app installed.
Google is constantly changing their apps, so this link might become outdated Connect smart home devices in the Google Home app
The key is, that when you get to “select device maker”, you’ll be presented with a list with thousands of brands, but that you search for “Tuya Smart”, not CBI, but do use your CBI app login details.
Mine is already linked, as you can see below
From here on, follow Googles instructions to edit device name and device type, or group them into rooms to suite your needs.