Soooo that will be a bit of a task there. What you would essentially have to do is create a thread that will request the data from the URL. Then the URL would accept it then send the data (prolly TCP). Then you would have to unpack the data for unreal to understand it.
However, I wouldn’t doubt it would be easier to get the cloud storage content as ‘DLC’. considering it is . There should be resources out there to help you on the DLC type of journey that Epic has created.