Hi Leonel Rivero. As of now, It is not possible to dynamically populate a list of choices from a web service query.
This GeoNet idea is pretty close:Use PullData feature to populate select_one choices You may want to vote it up.
You can also raise the rank of ENH-000119959: Add capability to populate a survey's choice list from a dynamic location, such as another feature layer or a database table by asking Esri Technical Support to associate your customer number with it.
As a workaround, have a look at this blog post: https://community.esri.com/groups/survey123/blog/2017/12/08/an-alternative-way-to-update-the-media-f...
