I believe this search URL will show all verifiable lepidoptera observations that don’t belong to Papilionoidea: https://www.inaturalist.org/observations?place_id=any&taxon_id=47157&without_taxon_id=47224 There might be some observations of butterflies that haven’t been IDed to the Papilionoidea level or below, but it should get you what you want.
I built it using this tutorial: https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki/63