Vizio 2016 Smartcast Soundbar

I’m upgrading my home theater and am interested in the newer models of Vizio soundbars. From another thread it sounds like Roomie now supports direct control of Vizio Smartcast-enabled TVs, so I was wondering if that support had been extended to the Smartcast soundbars? I don’t see them on the compatibility list, but this Github issue indicates that many of the same API commands also work for the soundbars.

Also, is there a way that I could check for supported devices myself in the app without having it already on my network?