iPhone 15 Pro battery consumption overnight

Hi all. I hope you're doing well. So I got my iPhone 15 Pro on Monday, and I absolutely love it. My previous phone was a XS so the upgrade was quite significant to say the least. However, I notice that the device use a hefty amount of battery overnight and I was just wondering if this is normal behaviour? My new phone loses anywhere from 15-20% battery over a 7-8 hour period. Anyone else experiencing the same thing? Is it an indexing thing? Or a bug in iOS 17?

Key points:

I solely use Apple's original 20W charger

Background app refresh is turned off

Hey Siri is turned off

I have disabled "Push", and only fetch new mail every hour.

Cellular data is turned off before bedtime

Always On Display is turned off

I have provided some screenshots from last night. Between 3am and 4am, Siri had the highest consumption. Otherwise it was only the FindMy app.