You actually can:
https://www.microdesignum.cz/EN/Products/MIDI-Modules/MIDI-Control-for-Electro-Harmonix-x9

bit expensive but it makes the pedal atleast a 100 times more usefull for live operation with a 128 presets
would be nice if EHX would build this themselve… maybe they can’t or won’t…who knows, but there seems to be a market for it.