[Plain text: That's not how telekinesis work]
(Disclaimer; I am not paraplegic, just a nerd)
Stop making Charles Xavier use his telekinesis to walk.
In order to do that, he would need to concentrate extremely hard and it would be very complicated. Keep in mind that he readily admitted that he's "no Marvel Girl," meaning that he's not a high-level telekinetic like Jean Grey, so he might not even be capable of the amount of control you're going for. If he is, it's not practical and there's no reason he would go for that other than the writer being ableist.
Guys, why go for ableism when there's already a far better thing Charles Xavier does? In canon, he uses his telekinesis when he needs to lift his wheelchair over stairs or other obstacles. In one instance where he did this, at a Hellfire Gala, it was him being petty because he's dealt with way to much to not enter the gala through the front door. At that point, he was being petty and that infinitely funnier than an ableist idea where he can magically move his legs even though there's literally no reason for him to do that.