I've run into a problem where prepopulated data for my first set of questions in my survey will show up when I'm using the Survey 123 Connect for ArcGIS app on my desktop (Windows 10), but will not show up when I've published it and tested it out on my iPad
Can you double check the capitalization of the CSV filename in the XLS form and the file itself? This is the most likely issue - iOS is case sensitive; all other OSes are not.
This was exactly the problem. There was an uppercased i. I checked the capitalization of all my CSV files compared to what I entered the file name in my pulldata equation and it all works now.