Amazon Kindle App

I’m a big reader and go thru several ebooks each month that I purchase and download to my iPad from Amazon. Whenever I clicked on a potential book that caught my interest, Amazon would let me know that I had previously purchased the subject book on February 20, 2018 (example). This notification no longer appears on my iPad which is a problem because I can’t always remember the title of books that I have already read. I tried Amazon Customer Service and they were most courteous but bottom line, no help. Is it just a setting fix? Did Amazon do away with this notification? Help pls. Thanks.