Raul, yes, you can use ArcGIS Pro to load data from a csv file (or other format) into any feature service. Without knowing what format the location/address is for the csv, I'll provide a rough overview:
- Create a feature class for the csv file
- Using any of the data loading tools; you could use the Append GP tool for example, load the contents of the feature class into the Assignments feature service.
- You'll need to properly field map your feature class to the Assignments feature service; here's a link to our doc which explains the Workforce schema --> Workforce schema—Workforce for ArcGIS | ArcGIS
- You'll want to focus on the section "Create an assignment through the REST API"; this explains the fields that must be populated for assignment to be created properly.
I'd suggest testing it out with a subset of your csv first to work through any issues.
If you have questions on this, feel free to post them.
Craig