For battery health
Please replace my IPhone device battery health
iPhone XS, iOS 15
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This is a user helping other users with tech questions
forum, you are not addressing apple here just fellow users
have you read
About the battery and performance of iPhone 11 and later - Apple
and maybe
iPhone Battery and Performance - Apple Support
and Batteries - Maximizing Performance - Apple
people report apple does not change
the batteries until they are lower than 80% in health
you can try contacting apple Get Support (apple.com)
and or give them feedback Product Feedback - Apple