Voice Assistant fall-back to Alexa

We use Alexa for Pandora, and other integrations & features that are not yet in HA and/or voice.

How can I have Assist “fall back” to Alexa if a command isn’t recognized?

I successfully achieved this with the Willow server using this automation as a hack and muting my Alexa units mic:

Might there be a be a better way now with the new Voice Assistant fall-back functionality?