I think you will find that really small cars will take your wheelchair, take it along to a garage or two to give it a try.
Our tiny Picanto automatic takes a folded wheelchair ( Karma Ergolite 2 leased for £100 through Motability) without removing “foot plates” or wheels vertically with a bungee strap around rear headrest to stop it wobbling around. Rear seats unaffected. Currently no Picanto or i10 autos on scheme, maybe when you order. Suzuki Ignis may also suit If auto is on scheme.
These cars don’t even take all your weekly PIP