I think everyone on here understands that the more data points the more your phone will need to work hence the battery drain. But what we are talking about here isn't just apps zapping the battery but battery drain of 1% every 5 mins even when its idle. So it's clearly not the same as it was on even iOS18.7.1, and I don't understand why you keep explaining how apps use up battery.
What's the point of having smart phones if we can't run our usual apps on it. I'm not using it for gaming, or intense scrolling or even long calls. Just light social media use and regardless of what apps you have, if you had the same apps (even if different versions) had the same amount of data points and what's stored on your phone on previous iOS updates then you battery drainage shouldn't jump this excessively.
This is clearly an iOS 18.7.2 problem, as others also keep saying!
I'll end here as I have managed to stabilise my phone a little, but I will not be updating to IOS 26 or any further iOS 18 updates. Good night!