Interesting. . . Lupu Pick's Scherben/Shattered (1921)
has been added to the Internet Archive for free viewing and download. This obviously for those who have no other access to the film.
This is a very key film in the development of the Kammerspielfilm, and the first of Mayer's trilogy, all of which were slated to be directed by Pick, the second of course being the sublime Pick/Mayer Sylvester
(1924), and the last going to Murnau at the last minute . . . Der Letzte Mann/The Last Laugh