It's a smart phone it will drain battery regardless whether you use it or not.
It's probably syncing stuff and checking emails , Bluetooth connections etc one the background.
I do agree 20% over a 12 hour is a bit excessive. I'd settle for more of a 10%-15% drain over that time.
I'd start with how good your signal is both WiFi and mobile where your phone is.
Next would be looking at permissions of background data using apps.
Social media apps are the worst culprits.
Samsung has somewhat fixed these kinds of drains in the S24 series so something to thing about unless they have the fix on the 6.1 update for your 22 series.
That's the only issue I had on my s21 ultra. That Google services was just killing my otherwise Awesome battery on it.
Hope my post she's a bit of light on your issue as it is what's it is and unless you real want to dumb your phone down I'd say upgrade to the newer model is the way.
