Thank you for posting this. My wife's iPhone 7 - same issue - significant battery drain problem started with installation of iOS 14 - had to follow Apple's guidance to unpair watch and reset the phone - did that - installed iOS 14.2 - problem didn't go away - so had to reset again - and in a couple of days - the problem became so severe and phone died completely - now I just have a brick - went to Apple store - and told them - phone was fine a couple of weeks ago before software updates and after software updates it's a brick - they as usual denied that it's not the software. The phone was perfectly fine with 85% battery capacity - If i had not updated and taken to an ATT store - I could have traded in the phone for 350$ - now I got zilch. Such incompetance from Apple - really - did they even test the software on older phones before releasing. Unbelievable.