Sony has unveiled the Xperia 10 III, which builds on the Xperia 10 II. The Xperia 10 III retains its predecessor's design, but Sony has upgraded its battery capacity to 4,500 mAh. Additionally, the Snapdragon 665 from last year's model has been swapped out for a Snapdragon 690.
https://www.notebookcheck.net/Sony-launches-the-Xperia-10-III-its-budget-entry-in-its-Mark-III-series-with-a-Snapdragon-690-SoC-and-a-4-500-mAh-battery.532148.0.html
Definitely welcome the new SD 690 chipset and the bigger 4,500mAh battery capacity upgrade, but I don't think that I'll be upgrading from the 10 ii. 5G network itself is still not a thing here in Malaysia, so no point in buying the 10 iii right now.