Sony has started upgrading the Xperia 1 II and Xperia Pro to Android 12, the second OS update for the pair. Android 12 will arrive through an OTA update, 58.2.A.0.899, and is currently eligible for US handsets.
https://www.notebookcheck.net/Sony-Xperia-1-II-and-Xperia-Pro-start-receiving-Android-12-updates-in-the-US.605986.0.html