Apple is planning to upgrade the LCD panel in the 11-inch iPad Pro to the mini-LED backlit type found in the new 12.9-inch iPad Pro. The upgrade will arrive in next year's refresh according to renowned Apple analyst Ming-Chi Kuo.
https://www.notebookcheck.net/11-inch-iPad-Pro-expected-to-pack-a-mini-LED-display-next-year-despite-OLED-panels-also-coming-to-the-iPad-range.549943.0.html