Startup/New Device battery drain in iP15 Pro

iPhone 13 Pro Max to 15 Pro - I just transferred all my data yesterday at 6PM and then must have missed the charger when I set it down to go to sleep around 11pm. I've done this before on my Pro max and it might drain 5% overnight. This new 15 Pro looks like I never set it down all night long - that drain curve is linear from my surfing on Chrome from 10-11p straight on till morning. It drained 32% in 8 hours with nothing but a (mostly black) dimmed AOD lockscreen.

I'm told that Apple now does the same thing Windows does and re-indexes your phone when it's new so maybe (hopefully) that's it. My battery page shows Chrome, Gmail, FB, and Memmy in the top 4 spots (70% of all usage) over the last 24 hours so I'm guessing that Apple's own internal iOS usage doesn't show up (how convenient for them).

Does this seem...normal?