Unpivot - replace values dynamically for additional columns OR keep nulls

In Query Editor, before an unpivot, how can I account for new columns of data being added when using the replace values “Null” with 0?  I’ve found that replace values does not pick up new columns when added to the table, thus, the unpivot removes the new column's rows with null values. Is there a way to make the replace values dynamic as new columns are added OR to keep nulls through the unpivot process and then replace them with 0's once all the values, including nulls, are in a single column?

I've only been able address this issue by manually adding the column name in the advanced editor's replace values code line.

Thanks,

Dane