Change the Value of Smarttable Cell after Standard Excel Export

Hello all,

I have a question regarding the default excel export of the Smarttable.

I have a formatter in a row which sets the value of the cell to "Nicht vorhanden" if the value is 0.

This should also be the case for the Excel export, but unfortunately this is not the case. Does anyone have an idea if this can be solved easily?

Thanks in advance