There is not a way to do what you want as far as that is concerned as far as I know.
I had suggested to
@Admin M@ a couple years ago (while proof reading the FC manual) that having an option to dynamically assign controller pedals would be very powerful and useful.
The Gordius controllers support this and it was a awesome when I was using one.
Matt said he'd look into it but I suspect it might have been lost in the shuffle or low priority.
Maybe I'll submit a wish.