Can you sync the 'Want to Read' Collection in Apple Books?

I just discovered the ‘Want to Read’ collection in Apple Books on MacOS and put a bunch of books in the list. But when I opened my iPad—it wasn’t synced.

Is there a way to make these collections/lists sync or is it per-device?

IMO Apple Books is bleh

Buy Yomu. Corny app names aside it’s actually the best I could find for iPad

You might be right, but I’ve got quite a few books puchased from Apple. Can you read those in Yomu?

It should be synced.

Actually, a few hours after posting my second message, I noticed that the list had become synced. So it’s working…just very slow!