Iphone 13 Pro Max Battery Drain #2

my phone is about 15months old and one day (not gradually) my phone started to die thru the day, it seems to need to be charged 2-3x a day now. I only use my phone from 8-5 for texting, I have gone to Apple store, they suggested that I delete two of my most used social media apps, I did that and reinstalled, I am always up to date on apps and software; I do not have my location on. I do not play/use my social media apps more than 1 hour a day; the battery life is at 92% overall and Apple confirmed otherwise phone seems to be good - any thoughts on what else to do/check as to what is draining my battery when the phone is not in use?