While the Mate 20 Pro and Mate 20X both feature AMOLED displays—as opposed to the regular Mate 20's LCD display—new information shows that Mate 20X users can rest easy, with their phones unlikely to suffer from the green hue issues found on the Mate 20 Pro.
https://www.notebookcheck.net/Huawei-Mate-20X-users-are-unlikely-to-face-any-green-hue-issues.365056.0.html