I hadnt checked it out in a while, but it seems to support OPDS now which is nice, I can browse my ebook library remotely now
Librera FD (F-Droid) has OPDS stripped out.
https://github.com/foobnix/LibreraReader/issues/1335
But you can get the Play Store version through Obtainium. It's the PRO version (also available with Obtainium) the one with OPDS support.