Possible or waste of time?

I got an iPhone 6 to fix (if possible) that had a hard beating by an AASP after some liquid damage (light saltwater damaging)

Now the entire row above the A8 chip is missing (caps, ic's, etc) the backlight circuitry is no longer with us and the owner told me it wasn't fixable by the AASP.

Can I somehow swap parts over to a working board and fix this or is the data lost forever together with all other data when an AASP gets their hands on a device? (no backup of course because the owner is an elderly family member)