LogFAQs > #980045326

https://www.justwatch.com/us is a great site for checking where things are streaming. I did a very quick check:

MAX - The Passion of Joan of Arc (1928) - Carl Theodor Dreyer
Kanopy (not sure what that is....) - The Rules of the Game (1939) - Jean Renoir
n/a - Citizen Kane (1941) - Orson Welles
MAX - Ikiru (1952) - Akira Kurosawa
MAX - Tokyo Story (1953) - Yasujir Ozu
Criterion Channel - Ordet (1955) - Carl Theodor Dreyer
MAX - Pather Panchali (1955) - Satyajit Ray
Criterion Channel - Harakiri (1962) - Masaki Kobayashi
MAX - 8 1/2 (1963) - Federico Fellini
MAX - Black Girl (1966) - Ousmane Sembne
MAX - The Battle of Algiers (1966) - Gill Pontecorvo
MAX - Persona (1966) - Ingmar Bergman
Criterion Channel - Playtime (1967) - Jacques Tati
Kanopy - The Conformist (1970) - Bernardo Bertolucci
ROKU Channel - Aguirre, the Wrath of God (1972) - Werner Herzog
Criterion Channel - The Spirit of the Beehive (1973) - Victor Erice
Some non main stream service - The Holy Mountain (1973) - Alejandro Jodorowsky
Criterion Channel - Mirror (1975) - Andrei Tarkovsky
MAX - Jeanne Dielman, 23, quai du Commerce, 1080 Bruxelles (1975) - Chantal Akerman
MAX - Eraserhead (1977) - David Lynch
Criterion Channel - The Ascent (1977) - Larisa Shepitko
MAX - Three Colors: Red (1994) - Krzysztof Kielowski
Criterion Channel - Vive L'Amour (1994) - Tsai Ming-liang
MAX - Beau Travail (1999) - Claire Denis
n/a - Amlie (2001) - Jean-Pierre Jeunet
n/a - Pan's Labyrinth (2006) - Guillermo del Toro
n/a - Synecdoche, New York (2008) - Charlie Kaufman
Hulu - The Tree of Life (2011) - Terrence Malick
Hulu - The Grand Budapest Hotel (2014) - Wes Anderson
Hulu - Portrait of a Lady on Fire (2019) - Cline Sciamma

A lot of those are streaming on multiple locations or you could pay a few bucks to rent too. But looks like MAX, Criterion Channel and Hulu gets you a very big chunk.

Not something I plan on participating in but I do enjoy tracking the topics.