@Jojoe you can get a wheechair in the back of the ioniq 6 easy enough on its side however, you have to check the seating and egress regress.
Keso and Jojoe you will get a manual wheelchair if folded and not much else, but most electric wheelchairs would not fit. Although it will normally suit my needs as I only do short journeys, but go on holiday twice a year, in which one of my PA’s will also have to take her hatchback car as well to get room for all three of our stuff . This was never needed with my current Kia Optima estate.