Even if you want it for yourself, that iPhone will be a paperweight

Finding objects of as much value as an iPhone can be very sweet. Let's not fool ourselves, it will surely cross your mind to keep it. After all, you didn't steal it, so it didn't come to you illegally either. However, you must put yourself in the situation of the other person, and it is that beyond the economic value of the device, it is likely that the iPhone contains very important personal data for the other person, to which is added the sentimental value that it gives to the device that person itself.

The iPhone will probably have a security code that will prevent you from accessing it and restoring it to put your data. And since it's linked to an Apple ID, it's likely that the owner has locked it out and it's completely inaccessible. Even the FBI itself has had a hard time unlocking an iPhone in these cases, so you should drop the idea of ​​getting it functional. The device will ultimately be a nice (and expensive) paperweight that will do you no good at all.