Trigger Remote Config Fetch on Data Changed

I'm new to Unity Gaming Services and using a backend for my games in general, so sorry in advance, if my question was already answered or my phrasing is poorly informed. I tried to find a solution for this, but could not find any information, nor am I certain this is the right approach.

tldr:

I want all active game sessions (Android & iOS) get notified, if a remote setting got changed (either by some sort of admin app and/or the Unity web interface), so that they can then fetch the updated remote settings.

I just want to avoid constant fetching. My usecase demands runtime changes of settings (states) by an admin/director application for a live performance. (The number of users who need to be notified about a state change could be up to 5000 at a time)

Is this kind of notification possible with cloud code, or do I need to think about a different solution?

Any feedback, tip, or angle is much appreciated