same for me on a Galaxy S10+ (Exynos).
Since I upgraded to OneUI2.5 the battery life is just awful!
Samsung, wtf are you doing there?
This ist not the first time an upgrade brakes some things...
I get excellent battery life on my S20+ Enterprise Edition. Light use gets me around 48 hours +. All apps are in deep-sleep, 5G turned off. Bluetooth and Mobile Data on all day. Never gets hot etc. Bixby routines set-up, adaptive battery turned on.