It does work fine, but I don’t really see the point. Your limited to the sweep, functionality, et al of the pedal, while if you use an exp pedal, you can modify a volume block, output etc, anywhere in the signal chain, pre amp, post amp, and you can adjust the curve, and taper of the pedal etc
I took all my old volume pedals and modded them with a linear taper pot so they became expression pedals and find I can do tons more with them.