All other Naim gear is Roon Ready but the recent Focal/Naim bars appeared without it. The same happened with the Mu-so Hekla but it seems they started certification later.
But never buy any gear in the hope that it will become RR. It may or it may not. And tell them that you will buy only if they certify.
It won’t have a problem with a 13 sqm room but they are always an acoustical challenge and you will end up using DSP and/or some treatment if you are serious about the sound. But that’s true for everyone.
Whether this is “high-end level” is a matter of expectations. I like the Mu-sos and am always surprised by how good they are, but they are still sound bars and don’t represent literally the high end of what’s possible