The phone is sealed and I bet most people think they need a new $1,000 phone when the battery does not charge well anymore instead of just being able to replace the $10 battery.
Learn to heat up the glue so you can replace the battery.
https://www.ifixit.com
See how Apple tracks the parts you use if you want to repair your property!
Other companies like John Deere do not want you to repair your property. Same for cars where if your side mirror does not work you have to replace a computer board that costs a lot because it is tied into other components on the car. In the old days it was just a cable that might need to be replaced.
iPhone 14 Continues Apple’s Digital Repair Lockdown
https://www.ifixit.com/News/66879/iphone-14-parts-pairing-results-apple-is-still-trying-to-monopolise-repair