Would it technically be possible to add headphone jack to iPhone 7?

1. I know there is some Lightning to headphone adapters that split the connector into a Lightning port and a headphone jack. Is there enough empty space in the phone (or enough empty space from removing something not necessary) to add a headphone jack and the chip from one of those adapters?

2. Would it be possible to then de-solder the Lightning port and solder the adapter to it, then re-add the port connected to the adapter?

3. If possible, how hard would it be?

If it isn't possible with the normal iPhone 7, what about the 7 Plus?