The problem is the wheelchair is not condusive to an adventuring environment, and minor changes do not make them work and any large changes make them no longer wheelchairs.

Disabled people exist, and they exist in fantasy and in history, but when your world has magic and “advanced technology” (artificers), there are so many better options than a simple wheelchair. Having your pc have an optional disability, then choosing the least optimal way to work around the disability, then complain when people begin to attempt to fix or change the disability is entirely on you.

Professor X lives in a time of asphalt and pavement.

Wagons and wheelbarrows don’t go adventuring. They go on predetermined dirt paths or in fields. Areas where a wheelchair CAN go but is not optimal. Any magical fantasy setting would never have wheelchairs because they are simply imprsctical for the period and multiple magical alternatives thst are objectively superior.