Actually, as I addressed earlier (and perhaps in another thread), Nicholas only has one personal Facebook profile. The one named "Nicolae de Roumanie Medforth Mills - Sustinatorii nepotului Regelui" does not belong to him. I am not sure that his personal profile is able to be found via search. I did try to find it when I was logged out of Facebook, but it does not show up. His personal page is simply "Nicholas de Roumanie" and it bears the "blue check" verified symbol, as do other Facebook profiles of certain people. He has made no personal statements on it since the day the King died.
I do think he may have control over the formerly official "Principele Nicolae al Romaniei" page, but it is rarely utilised.