A May release could well be on the cards for the Sony Xperia 1 IV as it seems the upcoming flagship has already taken a trip to Geekbench. The potential Xperia 1 IV produced an impressive single-core score in its test. It is also believed the Mark 4 variant of the Xperia 1 may come with eSIM compatibility in some markets.
https://www.notebookcheck.net/Supposed-eSIM-capable-Sony-Xperia-1-IV-shows-sleek-single-core-performance-boost-over-Xperia-1-III-in-first-Geekbench-run.614063.0.html