It’s currently (Nov/Dec ‘23) still undergoing certification at Roon but as I understand it will appear as a ChromeCast or AirPlay Roon endpoint in the meantime.
I’d say it’s the only device, independent or not, that supports bit perfect AlexaCast up to 24/192 - I’ve very strong suspicions that even Amazon’s kit tops out at 24/48 (conveniently masked as UHD) for AlexaCast - and multi room for that matter.
The USB connection isn’t an output, it’s just for playback of music stored on an external USB drive. Midnight Blue isn’t an option, just Space Grey and Silver. And HDMI is just ARC and again an input, not output, for TV sound etc.
I regularly play BBC radio to my WiiM Pro/Plus from LMS using WiiM’s Squeezelite feature, or from the BBC menu in the WiiM Home app. It’ll also play the links in BBC-Radio-lstn-HLS-.m3u list here https://gist.github.com/bpsib/67089b959e4fa898af69fea59ad74bc3