Nest not changing Away Mode on/off

When I invoke a script or trigger to change away mode, or manually change it in <> I am noticing that the Away mode for Nest doesn’t actually enable. This makes sense to me since Away mode is at the ‘Home’ level in Nest, and not the thermostat level.

Is this just not possible or am I missing something simple?

For ref. my code is

type: entity-button
name: Turn On Away
action: call-service
service: climate.set_away_mode
entity_id: climate.living_room
away_mode: true
entity: climate.living_room