The Sony Xperia XZs (released in 2017) was officially eligible for the Android 10 update. Its software support ended with Android 8.0 Oreo (and later, some regions received Android 9 Pie, but not universally).
If you need Android 10 features, consider upgrading to a newer Xperia model (XZ2, XZ3, or 1/5 series). For stability on XZs, stick with the last official firmware (Android 8.0 or 9 Pie, if available). sony xperia xzs android 10