This module sounds like what you are looking for: https://appstore.home.mendix.com/link/app/108605/
As Mike suggested the CSV module from the App Store is probably what you want.
I do something similar in some of my projects and use the CSV data to seed the application with relevant data.
There are good examples in the module to get you started. You create a non-persistent entity to represent a line of data. You load the data into a FileDocument and pass this into the Import CSV action, this then calls another microflow to import the data. This microflow loops over calling the Read next line action which populates your NPE with the data for that line. You can then do what you need to with that data.
Hope this helps.