Exynos Variant

Battery life improved,especially idle battery drain, Camera processing has also been improved, performance for me is the same no change observed.

Try factory reset, it should help.

Good, your screen off time is very less, that maybe the reason you are happy with that battery performance, let the device be in idle and on 5G network instead of wifi, i doubt you'll get this battery performance

Strange, it's working properly in mine.