Enable / Disable exposure to assistants on an entity level - Home Assistant Cloud

[AlexCherrypi]

I would love to disable / enable the exposure to Google Assistant, Alexa, and Assist on an entity level.

For example:

I have a heating blanket that I control via a light dimmer.
Obviously, you don't need a heating banket during the summer.
That's why I unplug it and put it away.
Unfortunately, this also means it is unavailable to Home Assistant and consequently unavailable to Google Home.

So every time I try to turn my lights (or my whole home) on or off via Google Home, it tells me it can't reach my heating blanket.
This is very annoying.

I would like to specifcally disable exposure of my heating blanket entity to the assistants when it is not available (not reachable via Zigbee). This, unfortunately, is currently not possible with Spook.