How to verify a used iPhone 14 Pro hasn't had parts swapped out?

Hey everyone! 👋 , I'm thinking about buying a used iPhone 14 Pro and I want to make sure none of the parts have been swapped out or replaced with non-genuine components. What's the best tool or app to check for this? I've heard of things like iPhone Checker and 3uTools are those reliable, or is there something better you'd recommend? Any tips from personal experience would be greatly appreciated. Thanks!