Correct - Roon can only see them via Airplay 2 or Chromecast.
Prior to September 21 roon was accepting “roon ready” & “roon tested” KEF wireless both LS50’s & LSX.
Now they only accept “roon tested” which the LS50WII are not yet certified.
Hope that makes sense.
Also see Uncertified Roon Ready devices announcement
UPDATE:-
Not sure I got the above quite correct: KEF Only offer “roon tested” which uses “kef streaming” not “raat”. This does not require certification and not subject to the Sept 21 ruling. Currently the LS50WII is neither “roon tested” nor “roon ready” so is only available on airplay/chromecast.