Hi Giovanna de Vincenzo ,
In tableau , they have four different types navigator style in case you are working with stories ..
In case you want a drop-down you need create a parameter in dashboard or create a filter in dashboard .
So in short they don't have a standard way to achieve this .But you can do it using different workarounds .
In case you are in need of work around ,please share a sample twbx file .
Please mark it right and helpful if this serves your purpose ,so that others can also get benefited .