No stereo HomePod on macOS

I can’t get HomePod work as stereo on macOS with Roon or Tidal app. I have no problem on iOS devices or iTunes on macOS . If I want to send sound directly from my iMac by Roon to HomePod, its not possible the same with Tidal app and youtube; I can’t stere-paired on macOS. Help if there is a way. thanks.

Room does not support airplay2 at this time so you can’t do stereo playback.only group them as two mono zones.