Ios Upgrade Battery Life. Please let me know what I should turn offdeactivate to get. Yesterday at 343 PM.

IPad Pro 129 4th Gen connected to a magic keyboard. Nonetheless there has been a worrying trend with recent iOS 14 releases negatively impacting the battery life of iPhones. Has anyone else experienced this.
I upgraded to iPhone 13 max and seeing my wifes 12 max giving more battery life has me a bit stunned.
First heavy battery drain while installing iOS 15. I upgraded to iPhone 13 max and seeing my wifes 12 max giving more battery life has me a bit stunned. Has anyone else experienced this. The reason might be unusual power consumption bugs outdated applications and storage issues.

