Pretty positive it’s OOP.
Well that sucks then. I own the release, but it’s still a bummer, so now there’s currently no English-friendly release of La Notte available anywhere in the world, is that right?
..
no, that isn’t correct :-)
Umbrella released the film in Australia back in 2007. The disc is overpriced though, at least from their website anyway.

special features: Exclusive Audio Commentary by Rolando Caputo, Lecturer in Cinema at La Trobe University, Melbourne and Editor of Senses of Cinema
Michaelangelo Antonioni: A Portrait (55 min)
Theatrical Trailer
PiscesRising
It’s going for about 50 pounds on amazon UK. Perhaps they’re just waiting for more shipments and marketplace sellers are taking advantage of the temporary lack of availability. Who knows?