https://wccftech.com/sony-xperia-xz2-and-xz2-compact-receiving-android-pie-update/

Unlike some of its competitors, Sony is actually pretty regular to roll out timely updates to their devices. The Xperia XZ1 was the first phone to ship with Android 8.0 Oreo, and the XZ3 was the first to ship with Android 9 Pie. Sony joins the ranks of OnePlus, Nokia and Essential as the non-Google company to roll out Android Pie for their flagship; the Xperia XZ2 and XZ2 Compact. The company released a schedule earlier, detailing which device would receive Pie at what point in time, and the Xperia XZ2 was on the top of that list.

Related Nokia 6.1 and 6.1 Plus to Get Android Pie This Month Followed by the Nokia 8 and 8 Sirocco