Icon Animation for Google Nest Card

I’ve got a button card for my Google Nest.

Essentially, I want the card’s icon to be animated if the Nest is actively heating the house. I don’t want it animated if heat is on and set, but not actually running (i.e. heat is set at 66 and house temp is 68).

Is that possible? I’ve researched it but I’ve come up empty in terms of whether there’s an attribute to delineate between heat being set versus active heating.

The integration displays ‘idle’ when heat is set & met, which I thought could be used to achieve this, but I’m not sure how. ‘Idle’ is not a listed attribute on Google’s trait page.

For reference, here’s what I mean by active heating versus heat just being on/set but not running