Can HA Groups of dimmable lights be exposed as dimmable to Google Assistant?

Tags: #<Tag:0x00007f328f215db8> #<Tag:0x00007f328f215c78>

Imagine an HA Group composed of a handful of dimmable light entities.
Using the HA app on the phone or web, I can dim/brighten them as a group. It’s great!

But, when exposing the Group to Google Assistant, it sees them as only a switch, not dimmable.

So, Is it possible to expose the group as dimmable if it’s composed only of dimmable light entities?
(feature request?)