As far as I know (I haven’t looked at the code), iNat only uses the scientific name when trying to match to Wikipedia articles. If a scientific name is a redirect on Wikipedia, the About tab on iNat will automatically show the article that it is being redirected to on Wikipedia.
Same issue was reported here: https://forum.inaturalist.org/t/taxon-page-i-ate-inaturalist-and-other-issues-for-those-lacking-a-wikipedia-article/3736 but not sure what was fixed in that case.