Like, there are ways to have interesting characters on wheelchairs in a fantasy setting.
Maybe it's a low-magic setting, or the gods are absent so healing magic is rare. Dark Sun would be a good example. A noble might get a wheelchair. They're not going to be out there fighting in the gladiatorial slave pits, but they're good as set dressing. Could work well as a player's side character for political intrigue in a large city, while the "main" party is wandering around the wasteland turning slavers into corpses.
Maybe the character was born crippled, or was crippled in a freak accident or due to some wasting condition. Magical healing is available, but the character refuses it because they think it's a test of faith from their god, and they will only accept healing once they prove themselves worthy. They'll tumble around and probably spend half the time hanging off the barbarian's shoulders because their wheelchair broke again, but they are persevering. It's a personal trial, and everybody considers them a fanatic for it. And, of course, they're a spellcaster. So they don't need fancy footwork to get the job done.
Maybe it's a gothic horror setting and the character was cursed. Made fun of an old gypsy woman's hairy legs, she indignantly chanted "skedaddle, skedoodle, your dick leg is now a noodle" and now the character is known across the village as Mr. Floppy. Since it's a specific curse, no amount of normal magical healing sticks. So the character has to find a group willing to take them out into the dangerous world to find out just what, exactly, is going to lift that curse.
Note that in every single one of those scenarios the character being crippled is seen as a challenge. It's bad for them. It's not something to be proud of, and it's something the character is actively attempting to either resolve, or compensate for. The character might be proud of their resolve, but they're not proud of their disability. But having someone with easy access to healing magic going around on a wheelchair without them being at least a little crazy in order to justify it is just fucking dumb.
