Exposing Devices to Alexa through Front End

I currently have Alexa setup connecting direct to my HA (not Nabu Casa) which is working fine.

In my configuration.yaml I have

       - scene.*
       - cover.*
       - light.lounge
       - light.bedroom

In the front end now entities have a voice assistant section with an expose toggle.

Is this purely for Nabu Casa or can this be used instead of the yaml?

I have had a play but it doesn’t seem to work (I looks like I would need to add Alexa as a voice assistant in the settings but the only option to do so is via Nabu Casa)