How is Potential Difference Created on Resistors in Electrolytic/Ionic Conductors?

When we have a resistor in electronic conductors, potential difference is created via surface charges which accumulate on conductor surface.

What about electrolytes?

I am not sure if electrolytes can create potential difference in the same way since surface in electrolytic conductors isn’t as well defined as in solid conductors or wires and may not follow the current path in electrolyte.