How do I automatically download new Apple Books to Mac that I purchased on other Apple devices

I have a MB pro 2021 and when I try to select the check box in the Mac Books App for "download new purchases automatically," The box unchecks itself. Does anyone know why this is and how I can fix it? I've signed out and back into the Books App. I've re-authorized the already-authorized MacBook. I've checked system settings / My Apple ID (at the top) and then iCloud / iCloud Drive. Books is listed and already checked marked. When I check settings / privacy & security, Books is not listed under "files and folders." I added it as an approved app, and still the above-mentioned checkbox will not stay checked. I'd like for my Mac to automatically download books I buy from Apple. If anyone has suggestions, I'm all eyes.