I tried to get that corrected last year. Apparently, someone marked it as introduced for the entire US, which got propagated to all the subunits of the US. The status is set in the checklists for various "places", and i got it corrected for 2 places: Oregon and United States, but that doesn't seem to propagate down to county checklists, which all still have it listed as "introduced" still. I'll pursue this on the new Discourse iNaturalist forum (
https://forum.inaturalist.org/)