when you click on the introduced indicator on the observation detail page, you’ll see the specific place that contributes the introduced establishment means record. in this case, it’s Teide National Park:
so then if you go to the place’s checklist and search for the taxon, you’ll be able to to edit the establishment means record, as needed.
it’s possible there are other encompassing places that have this taxon set as introduced. normally, you would be able to find all of the places in the status section of the taxon page. however, in this case, there are more than 100 establishment means records for this taxon, and this page has a known limitation where it will show only up to 100 records. so, as a workaround, you could use this to see all the establishment means records: https://jumear.github.io/stirfry/iNat_taxon_est_means.html?taxon_id=47560.