A friend just turned me onto these
https://www.libraryextension.com/
If you visit an amazon page, it checks to see if the book is available at your library in print, digital or audio
https://www.overdrive.com/apps/libby/
Search your local library for digital books
Hoopla is another audio book app where you can check out audio books from your local library. My kids use that all the time.
Internet Archive responds: Why we released the National Emergency Library
https://blog.archive.org/2020/03/30/internet-archive-responds-why-we-released-the-national-emergency-library/