In my Amazon (U.S.) account, they've now reconnected the Kindle Points and Rewards pages that they previously used during the summer reading progam. Still in beta though. See attached screenshots. Here's the page from which they were taken:
https://www.amazon.com/Rivers-London.../dp/B01ABNB8EW
I also have a different thing called "Great on Kindle" where I can get a $2 credit in addition to the points. That's shown on this page:
https://www.amazon.com/World-Travel-.../dp/B083SN8RF7