Search field not showing on a Ref dropdown

[Luciano_Ramo]

Hello All,
I am trying to get a search field on a REF dropdown as shown in this example app https://www.appsheet.com/samples/How-to-search-for-items-in-a-dropdown?appGuidString=9333ff2f-1e5a-4...

I did all configs the same way as the example app but it won´t show the search field.

any ideas on what I am missing here?