Form Designer: dynamic dropdown inside Data grid not working

[ppr (Peter Preuss)]

the field is matching the part of th argument
maybe a name not so close to any programming keywords is more to prefer.

Also have a look here:

Passing Drop-down values in UiPath form

Do a start with following and explore / debug it later: Use an argument e.g. with the name countries but add _dropdown on the name Argument datatype: Dictionary(of String, String) [grafik] ensure when working later on the formular the e.g. key is using the name WITHOUT _dropdown [grafik] just configure it and check in a first interation what will be displayed and what will be returned later in the FormFieldsOutputData