There is a ballistic chute on the cirrus SF50 (their single-engine jet). It's a 7 seater IIRC (6 minimum), and roughly the same weight (2.7T for the cirrus, 3.1 for the lilium).
Design for hot-swap batteries, and eject the batteries (with their own smaller chute or chutes)?
Forgive me if I don't consider dropping lithium batteries from several hundred meters up a safety feature.
A parachute on this system is a lot of extra mass to compensate for a problem solved when the Wright brothers were around.