Uploaded Books missing from Apple Books library

Hello all,

Lately when I've uploaded epubs to the apple books app, they won't show up in my library. If I've added them to a collection they'll show up there, and if I search for them they'll pull up, but they won't show in the main library category. None of the missing books are hidden, and under the main library section nothing has been dumped into the "finished" or "want to read" categories.

I deleted all my books and re-added them, but about 60 books are still missing (and oddly enough, the books that went missing from the library section are different than last time before I deleted and re-added, but still the same quantity). I'm using a manually added collection that has all my books in the meantime, but I shouldn't have to make a special collection to see all the books I've uploaded, they should all be visible in my library.

I'm honestly at a bit of a loss here. Does anyone have any ideas for how to get all my books to show up in my library?

Thanks! Any advice would be appreciated!

[Re-Titled by Moderator]