Hey guys for those of you stuck with XML data structures that Velo is not supporting to parse, here is a solution: https://github.com/factmaven/xml-to-json
This is an API that transforms your XML data into a JSON object. The concept is quite simple, from Wix on a Velo (backend file) write a fetch API query to this URL:
On this image, the blue area represents the API URL, and the green area represents the URL provided by a server that is sending an XML response
Using fetch you can send a request to the URL https://api.factmaven.com/xml-to-json
Make sure to add the ?xml= and your URL to the server that is responding with an XML structure
The response back is going to be a JSON object with the content of the XML structure, that you can then parse with JSON.parse() within Velo and use it in whatever way you need such as storing it on a database collection or displaying it on a clientside.
IMPORTANT NOTE: Make sure that you write the API on a backend file otherwise you would have a hard time with the CORS policy, blocking the response. Regarding the method in your API simply use GET.