Factory reset worked for me on my s10. Downloaded Samsung Smart Switch to my laptop. Backed up all the data from the phone using USB cable. Factory reset the phone. Uploaded data from laptop back to the phone. No battery drain at all now. Not sure why this works but it did for me.
I'm having the same issue, in pocket while at work and I've gone from 100% down to 43 and I haven't even installed anything on it yet.
My note 9 lasted much longer, hoping for a software update with a fix!
S10 here, i dont even have the adaptive battery thing on and my battery life is awesome. Put on airplane mode at night first few nights and i only lost 2% lol. During day it lasts all day no problems with 50-70% depending on usage.