Welcome to the forum, ddweis! Remember to vote for your own feature request. :)
A related feature for the web interface can be found here: Search for native taxa in the user interface - Feature Requests - iNaturalist Community Forum
For both platforms, being able to filter to just native species would be useful. Currently, on the website, one can filter to introduced species. I don’t use Seek, so I don’t know if that’s an option there.