Why does my iPhone 11 get hot even when charged and not in use?
Why does my iPhone 11 got hot? It was charged and not being used.
[Re-Titled by Moderator]
iPhone 11, iOS 18
Has the battery ever been changed in the phone? It is now a 6 year old iPhone and it likely needed a new battery some time ago. Open Settings > Battery > Battery Health - if it's 80% or less, it's past the time to pay Apple to replace the battery.
iPhone Battery Replacement - Apple Support