Keyboard PCB Design Review Request
Any advice would be appreciated



I don't see any pull down resistors on the rows - maybe they are internal and set-up in your code.
I don't see pin numbers on devices - this makes it hard to check things.
You don't have notes on the circuit that tells prospective layout guys (if used) how to position the decoupler capacitors.
I'd consider putting power reverse protection on the incoming power supply on J1. It looks like it may be a USB connector so I'd also be concerned about adding TVS diodes to protect from ESD event surges.