Configurable List: Can one field in a configurable list be a drop down list

i've got a configurable list, which works exceptionally well, but for accounting purposes I want to standardize inputs on one of the fields, and think a dropdown list would be best.  i'm open to suggestions but would appreciate a reponse (this is my second query)

In the Widget Configuration of the Configurable List, you can specify a dropdown field for a column. Please see below.

I was trying to find the form you are working on (with Configurable List) but I can't find it. Can you please give us the form URL for us to check your concern if you still not able to add dropdown to your widget?