Pedro,
With the Web_API URL you sent, I was able to get to the latitude and longitude values and use them to build a new list. Notice how at each step I checked. the value. My experience has taught me that when working with complex JSON in Thunkable, do not try to build all of the blocks up front. Build one loop at a time, and check the results as you go. I’ve included a screenshot as well as a link to the project (with the URL removed).
https://x.thunkable.com/copy/633fe638c21cbbdbfd6a695eddadb54b