https://wccftech.com/apple-says-jelly-scrolling-is-normal-on-ipad-mini-6/

Apple launched the iPad mini recently and it has been received pretty well. The much-needed design overhaul makes the iPad mini 6 great in terms of portability and performance. The display is now bigger all thanks to the uniform bezels on all sides. However, it was previously reported that the new iPad mini 6 features a "jelly scrolling" where one side of the display refreshed faster than the other. Apple has now issued a statement regarding the subject.

The jelly scrolling issue is most noticeable when viewing documents or web pages in portrait mode. Apple has confirmed to Ars Technica that the "jelly scroll" issue is normal for devices with an LCD panel. This is due to the fact that LCD screens refresh line by line which allows the delay to occur between the top and bottom.