Xiaomi has already released official Android Pie-based builds for a number of its 2018 devices. Recent rumors that may emanate from the Chinese MIUI community indicate that the Mi 6X will soon join their ranks. This phone, which is a twin of the Android One phone, the Mi A2, is a solid mid-ranger with the Snapdragon 660 processor.
https://www.notebookcheck.net/Xiaomi-reportedly-starts-work-on-Android-Pie-update-for-the-Mi-6X.413970.0.html