In the main header search:
-Search for the place of interest, e.g. the state, country, or other place you are interested in and choose “About”
-Lefthand side>View check list page
-Search for taxon where it says “Type taxon name”
-If not on list, “Add to list” and add taxon to list
-Once on list, click “Edit” next to the taxon
-Change “establishment means” and Save
Do it for the largest area it is introduced (continent, if possible) rather than country or county/province/subregion.
iNat doesn’t track invasiveness, just introduced/native.