More than a year ago, I cut a "branch" off my mature ZZ plant to propagate. I planted the cutting in a small pot but left the pot outside in the garden. Then the cutting got rotted and only a "stump" was left.
A couple months ago, I needed a small pot for some other plants, so I upturned the pot with the ZZ stump in it only to find out there was a tiny shoot under the soil line!
So I re-potted everything and put the pot at the place where I could easily watch it. Finally, the new growth surfaced!
ZZ plant is easy to propagate as you can see. And even if you only have a "stump" left of a cutting, don't throw it away but keep watering it, you may eventually get the plant you wanted.