We have Bianchi full motor road e-bikes, I tried my bike in the back of the Jazz before ordering. I tried with the magic seats up and because it had drop handlebars the bike was too long to fit, even with the front wheel off and handlebar turned.
I then lowered the rear seats and the bike would fit in, without the front wheel, Handlebar forward then turned to fit.
I was thinking I could get my wife’s in with the rear wheel first because her seat height is lower.
However this is great for short runs but no good for holidays because there then is no luggage space left with two bikes and two front wheels, so could not even fit the bike batteries in the rear.
The bikes are too heavy for me to lift with battery in place (around 15-16kg) so even taking battery out the bike weighs around 13kg which I can just manage to lift.
This made me think of the tow bar and bike rack solution. Yes expensive, but would last a long time and in the end easier to usable manage - and I get luggage capacity as well!