I wouldn't stress about a 2% drain as it is not a substantial drop for time period.. watch after hour and report drainage also use your device care options for battery optimization.. hope that short summary helps
I got the Note 20 ultra 5g and the batteries life is no good. The phone doesn't last a day without having to charge it! This is the first phone from Samsung where I had a battery issue. I don't know if it was the update I got last week Friday that impacted the battery but this is ridiculous for a phone that costs $1300!
Samsung... please better optimize the software on the Note 20 Ultra. My Note 10+ had considerably better battery life. I'm am very disappointed thus far. Fingers crossed you figure this out. I've employed all the normal tips and tricks as well.