Volvo On Call - is this app still alive?

Yes its very much alive, you can check the specific volvo on call thread.

This update is about an old outdated volvo API.
Volvo changed to a new API, but the old one was still alive and supported by the App for users that did not transfer yet.
Volvo has clodsed it down, so its removed from the homey app too

The app is now only supporting the new interface.

Instructions are given at the start of the thread mentioned above