Refresh dropdown without page refresh

I know this has been addressed before but Im not finding a solution.

I am able to refresh a RG (repeating group) with a page refresh and I assumed the same solution would work for a a dropdown but it is not working .

Anyone have any suggestions?

Make a custom state on some element that is a list of the choices you want in your dropdown. Set your dropdown’s “choices source” be that custom state. Then you can set the state of your first element through a workflow. That should pull fresh data I think.