Sont started to roll out a new software update to the Xperia XZ Xperia XZs over the last week. The update comes with build number 41.3.A.2.171 and August 1 security patch.
Xperia Blog reported that the Xperia X Performance also received the same firmware update but currently remains on June 2018 security patch (build 41.3.A.2.149).
A few days ago, Sony officially announced the Android 9.0 Pie update roadmap to its Xperia devices. The company said that the Android Pie update on Xperia XZ2, XZ2 Premium, XZ2 Compact, and other Sony Phones will arrive starting November this year.