Sony has started to rollout Android Oreo to Xperia XA1 family: Xperia XA1, XA1 Plus and XA1 Ultra.
Currently the update is rolling out across multiple countries. The update weighs around 885MB and brings the February Android security patch. The update changes the version number from 48.0.A.1.131 (Android 7.0) to version 48.1.A.0.116 (Android 8.0.0). Multiple users also posted the screenshot the device running Oreo.