My feet are wide and flat as a duck, and I always have trouble finding comfortable footwear.
I used to have a great pair of Engineers boots.
These were comfortable and they were the first boots I wore out.
I have been looking on and off for these for about a year.
13EE or 13 XXwide is all I can find.
I don’t know if they have exactly what you are looking for but I buy shoes for my 4E feet here, www.wideshoes.com