The company announced the new update via an official blog post recently. So, as per the post, the update will be available for the standard Kindle (8th-Gen or above), Kindle Paperwhite (7th-Gen or above), and Kindle Oasis models.
Now, coming to the new features, the update will add a new quick-settings UI to the aforementioned Kindle models. This will allow users to simply swipe down from the top on any screen to access the Airplane mode toggle, brightness bar, sync button, and a button to jump to the “All Settings” page. So, as you can imagine, the UI will be similar to the swipe-down control center that we have on Android.
Users will also be able to easily switch between their Home screen, the Library page, and the current book they are reading with a dedicated navigation bar at the bottom of the screen.