iPhone 15 pro battery drain

Good morning, I don't know if you are also in the same condition as me, but the battery of my iPhone 15 Pro, purchased at the end of September, is really bad, much poorer than my iPhone 13 Pro which had a battery status of 90%. Loading it up to 100%, I can't even get through half a day, so I'm forced to charge it twice a day. Another absurd thing is that the always on display has a truly exaggerated consumption, in 3 hours it absorbed 15% of the battery, so much so that even the Apple consultant I asked for assistance was amazed when she looked at the usage statistics. I have already deactivated Siri, notifications, background applications, privacy and security options deactivated and then as soon as I turn on the Apple Watch they reactivate again, but how many bugs are there, but above all what to do about the battery problem