Unable to access a dynamic dropdown inside a Panel in Forms

Hi All,

I’m trying to access a list variable inside a Panel which is being shown when a certain condition is met based on above present dropdowns.

Suppose I have two dropdowns:
DropDown1 = Process A, Process B;
DropDown2 = First, Second;
DropDown3(Which would be inside the panel) = dynamic population of values.

If I select DropDown1= Process A and DropDown2 = Second, a Panel would be visible, and inside that panel I want to populate DropDown3 with some values that I’m getting from Excel.
I have read the data from excel and converted into a List. And passed that list in the collection as well.

Still I’m Unable to see no Elements inside the DropDown3.