Choose audio output from Plex web

I’d like to be able to choose which smart speaker audio comes out of when playing from web interface.
I’ve asked on the forums if this is available but not had a response so raising as a feature request.
I know I can say, for instance, “Alexa, tell Plex to play Rumours by Fleetwood Mac on the Everywhere group” but it gets a bit of a mouthful when you want specific songs or playlists and there are occasions when I can’t issue voice commands.
I’d like to select an album or playlist from the web interface, but have it play out of whichever Echo or group of Echoes I choose.
The Spotify (spit!) app has the option to play through any of my Echo speakers or the local device, but Plex web player only appears to support playing through the device where the web page is loaded, unless I’m missing something?
My reason for wanting this is I’m often on Zoom meetings and have music on in the background - I don’t want the music coming through my headset that’s attached to my laptop, and I can’t really start speaking Alexa commands if I’m talking in a meeting.
I can bluetooth connect my laptop to my echo but that gets awkward when I mute the volume.

Thanks, Pete