it is not very easy to input chords, when you sit on a midi keyboard and will play a chord with both hands.
For this you need 3 hand, 2 for playing and 1 for holding down the shift key.
It is possible in the future, that you can assign a midi controller i.e. a footcontroller for this chord function ?
Perhaps, i recommend the sustain controller CC 64, if you enable record the footcontroller is the shift botton and if record is disabled you can use it for ordinary sustain.