score:3
Malmö isn't a big tourist city. Most tourists take weather and school holidays into account and visit during summer. During summer sightseeing boats depart every hour and there is a bus tour as well.
Outside of summer there is less tourism. It is still possible to rent a smaller boat and pilot it yourself, but I'm not sure if she is mobile enough to board it.
For wheelchair rental I only find one company just outside Malmö, they might deliver too if it fits them, otherwise there is bus stop close by. https://keepon.se/sida/uthyrning
Upvote:3
We ended up renting a boat from BookaBoat, as that seemed easier to board than the GoBoat ones. It worked, and we ended up seeing a lot of the things we wanted to see from the water. I don’t know if I could unreservedly recommend this e.g. for solo travelers with limited mobility though - there is a set of stairs down to where the boats are moored, and while it was possible for my relative to get on and off the boat with assistance, it would have been a lot more difficult unassisted.