Someone would need to import boundary data. Possibly from DuPage County's open data:

https://gisdata-dupage.opendata.arcgis.com/datasets/19fd14e775b84bc9957ef65005f6b3fc_1/explore

Before that, one would need to determine whether the license is compatible with OpenStreetMap:

https://videos.dupagecounty.gov/gis/Open%20Geo-Spatial%20Data%20License%201.0%20Final%202015.pdf

Or get written permission directly from DuPage County.

https://wiki.openstreetmap.org/wiki/Import