Please keep in mind, in my opinion, with PN, there is no one solid "fit all" answer to every situation and what works for one may not work for another. With that in mind, I can offer the following. I was evaluated and prescribed the ankle foot orthotics (AFO's) in 2020 and have been driving with them since 2020 and drive today. I drive about 14,000 miles per year and someday will likely need hand controls. AFO's were prescribed for drop foot and my balance has improved 80%. Without them on, I must walk with a cane. Perhaps he can be evaluated by a medical professional to see if AFO's would be required. Wish you the best.