I like the Megane, unfortunately the boot doesn’t look big enough for a wheelchair.
Approx dimensions: W96 H62 D65 cm / 37.8 x 24,4 x 25.6 inches. The problem I see is the boot is low in the floor, causing a large lip getting a wheelchair etc out.
It could possibly hold a wheelchair upright, but as you say the lip is to high.
Enyaq EV