how to filter data from api calls

Database & APIs

i can't seem to find the option to filter the api call i have made,

What have you tried so far?

i tried to find this option of "unique options only" i cant find it. the other method i have tried were to do listview and generate children from variable, but it doesnt allow dropdown widget to do so

Did you check FlutterFlow's Documentation for this topic?
Yes
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