AFAIK the only systems that can reliably do this including chords are guitar synths, which require special pickups that capture the vibration of each string ind

AFAIK the only systems that can reliably do this including chords are guitar synths, which require special pickups that capture the vibration of each string independantly. Some guitars are made with these special pickups already integrated, so at first glance it might look like an ordinary guitar + pedal arrangement. For example: https://www.roland.com/global/products/gc-1/ https://www.roland.com/global/products/gc-1/