I noticed this high use of the Locked screen App with another user post within Apple Discussions. Maximum Capacity is at 98% in less than 2… - Apple Community
His complaint was regarding the the maximum charge capacity dropped to 98% with in a couple of months.
I noticed his Locked screen App is using the majority of battery each day. More than 2 hours each day.
While my iPhone PMax uses maybe 4-5 % or just a few minutes of the Lock Screen App in its battery consumption each day.
Obviously there is a different configuration of my settings than his. There are many settings from Siri, active widgets and many numerous others. That will be eating away at your battery while locked.
There might have some settings that might be helpful to reduce this particular issue, And reducing the amount of “Dynamic Island" features, Live Activities that are active when your phone is locked could be helpful.
I am not an expert but this has help me. I have had only 28 cycles with in 75 days.