Indeed, Roon wakes up all the devices it controls in my house (Devialet Expert, Devialet Phantom, Naim Muso Qb2, Bluesound Powernode). I think that’s one of the requirements of Roon-Ready certification.
The people behind Roon had a lot of experience before creating Roon, such as designing the Meridian Sooloos server/streamer system. I looked at it over 10 years ago, it was very impressive, but you had to use a fixed touch screen and it was limited to the 500gb internal storage.
That said, a lot of streamers will wake up when you send something to it, all mine will be woken up by any digital source, whether AirPlay, Spotify, uPnP etc.