The Earth One stories are original Graphic Novels
Per the agreememt with DC Universe, this site, and DC Comics, a separate unit that actually publishes the comics. No Original Graphic Novel will be given to the DC Universe library.
Several of them are on sale at Comixology right now.
If you’ve a participating library and a library card, all of the Earth One books (minus Teen Titans Earth One v2) are on Hoopla for free too.