overheating iPhone 14 issue also that battery drain.
Automatically, the heating starts and the battery battery drains. unable to charging at this time.
iPhone 14, iOS 18
Read this support article about what to do if your iPhone or iPod touch won't charge --> If your iPhone or iPod touch won't charge - Apple Support
If none of the above help, get Apple to have a look at the iPhone. Find a service provider https://locate.apple.com/choose-country-region and/or visit a Genius Bar Genius Bar Reservation and Apple Support Options - Apple