Modifiy yaxis’ values to UTM projection coordinates values

Hi,
(sorry for duplicate question. I had chosen wrong category. It would be python)
I followed this example.“3D Surface Plots in Pandas”. I created my own 3d Dem.
But I want to modifiy xaxis and yaxis’ values to UTM projection coordinates values.

I couldn’t do that.
Can you give me hint. ?

kind regards