Ezlo Plus RGB bulb no colour option in Google Home app

I have a Hank RGB Z-Wave bulb paired to my Ezlo Plus.

In the Google Home app there is no colour button to change colours.

Screenshot_20210915_013556_com.google.android.apps.chromecast.app

This is a Philips Hue RGB light and this is what it should look like with the colour button visible.

Screenshot_20210915_013607_com.google.android.apps.chromecast.app

And then you see this with different colours your can pick.

Screenshot_20210915_013629_com.google.android.apps.chromecast.app

Are RGB light devices paired to an Ezlo controller not fully implemented for Google Home integration?

This is a Z-Wave Fibaro RGBW module paired to a Vera Plus controller and in the Google Home app, it does have a colour button present, so it should be possible.

Screenshot_20210915_014931_com.google.android.apps.chromecast.app

But it seems its not working for an Ezlo Plus controller.

I’ve not tried yet, but presumably this also means I could not voice command the Hank RGB bulb paired to the Ezlo Plus, to change the colours via a Google Home speaker.