Trigger action_ based on confidence level

We would like to have an action handler for all events below a certain confidence level.

The requirement is straightforward, any events that have an intent below a certain confidence threshold will trigger an action we have written for handling this.

What’s the most straightforward way to tell Rasa all events below the threshold should fire action_handle_low_confidence() ?

We’re aware of Fallback policy, but had the impression that was removed in 2.0. So we don’t want to paint ourselves into any corners that will make it hard to upgrade.

Thanks, this is pretty crucial for our use case.