I have a Bike Friday pakiT, non electric. It's a pretty light bike to use as a starting point for an ebike.
Maybe with this; she also has the option of placing the bike inside the vehicle. Here are the specs from BF:
https://www.bikefriday.com/folding-bikes/e-pakit/
"The heart of this brilliant system is the Bafang G01 Front Hub Motor that smoothly delivers 250-500W of power at a top speed of 18 mph for up to 20-30 miles on a single charge. With a 2+ hour charge time, you can count on this bad boy to get you to work and back without breaking a sweat, or leaving you hanging"